I was a former NEET. You get money but it's not enough to actually do anything with your life, it keeps you alive and you just get used to it. It's a pathetic life and I hate that I fell into that pit, but it's a weird kind of hell. The money is enough to let you survive, so you don't have the sink or swim mentality forcing you to deal with whatever is holding you back. At the same time it's not enough money to enjoy life or save up for something you want. Add in shitty mental health care, stupid requirements for entry level jobs (cleaning jobs asking 2+ years experience) and I can see how people don't always get out of that lifestyle. Easily the least favourite part of my life.
None of the people in that community are happy btw, and for how they spend their day, I can guess it's on the itnernet and playing videogames. I really, really, wish I spent my time studying as a neet. I definitely had the time to learn a skill, I just didn't have any passion or ideas. Now I hate myself for all the wasted time, mainly imageboards. Still you can't be the person you are today if you didn't make mistakes and I think I learned some important lessons, better late than never.