It's all about modern people being self obsessed, all the things listed are just cope arguments for why people can't find a fuck, or wouldn't advance to the point of the fuck. No one wants to stop his hedonism and spend the next 20 years being in charge of a potential tard baby.
You got the trashcan rating but the first part of your comment is right, most people today have no interest in forming a family. As someone from a third world country I have to laugh at the economical arguments as to why birthrates are low, rate me dumb too if you want for saying this but I think that people in first world countries are sheltered, and what they think are great crises or horrendous living conditions are the sort of things that someone in Uruguay would not sweat about, and in fact considers normal (and Uruguay is not Liberia).
Birthrates are not low because children are too expensive, I'm sure that if you made an excel spreadsheet of all of your expenses you will see that waste hundreds of dollars a month on average on things that can be downgraded or eliminated all together, and this number might in fact be more than a thousand, I talked to a KF user that complained about his economical situation while spending an absurd amount of money in gun related things, for example, used $4000 night vision goggles, and he was making 60k a year.
Birthrates are not low due to "patriarchal" society, in fact when a society is patriarchal birthrates go up, and birthrates are not low because you are too focused on making money either, you great-great grandpa had 6 kids and he was working all day, and when he got home he worked on fixing things, doing projects or having a small farm in his backyard as was common back in the day, yet he had time for kids.
Birthrates are low because both men and women don't care about it, but for different reasons: Women have feminism brain and think that having children is oppression, they think that having children young is "wasting" their youth and that they should either not get married at all, or only do so when they are close to being infertile, their mind is also focused on having fun and living in the moment "having experiences" rather than having children and taking care of them.
In the case of men they get their sexual fulfilling from porn rather than women (this was even admitted by that WEF guy that said they are trying to lower birthrates with porn); men also don't want to be men, they don't want to work like your great-great grandpa did in order to support a family, they don't care about being financially responsible because they are like women in the sense that they want to live in the moment "having experiences" but in a different way, and a lot of men don't even approach women anymore, you can see this in data too, you look at data and around 60% of men under 30 are single, and if you do a google search for marriage data 100 years ago in the 1910s 92% of people were married.
You have to admit that there is a masculinity crisis, it is double think to believe that there is an abundance of soyboys out there that only care about consuming games, anime and media like manchildren while also thinking that there is not a problem with masculinity in society.
It also has to be said that less and less people leave the house, in the past the internet did not exist, so in order to be entertained you either had to cultivate a hobby or leave the house to spend time with others, which meant that men and women would constantly interact, forming relationships and friendships, and of course this means that everyone would have adequate social skills, something that lacks today.
Women don't care about having children due to "Live, Love, Laugh" mentality, and feminism that makes them think that being a mother is being oppressed(and this goes double for being a stay at home mom) and men have their own version of "Live, Love, Laugh" where they don't want to work hard, be financially responsible or stop watching the adult videos, and a lot of men are not even approaching women in the first place.
My hypothesis is that the issue is almost exclusively cultural, maybe the solution is shaming? Whenever you see a man wasting his time, money or acting like an incel just shame him into being a man, "bro you are a man, how are you gonna get a wife if you are broke and watch anime all day? Go work lmao, anime is not hobby"; and when you see a woman talking about how she wants to "live life" and maybe get married in her mid 30s, shame her about how she will hit the wall and will have to settle with less than what she can get now, or shame her about how she will be a cat mom and an old lonely woman who will treat her nieces and nephews as her own to cope, maybe shame is the solution, Japan shames fat people and has less fat people, right?
