Going to let you in on a little secret. Most people who make "PS1" or whatever other old console aesthetics never even touched these consoles. You know how rumors start with someone telling someone else, then that someone else tells someone else until it reaches a point where 1% of the rumor is true as opposed to 90% of it? It's like that in trannydev, one person copies someone else's style which continues until the style are incomparable (and quite frankly incomprehensible) to what they were originally copying off of.
If they even do that, most trannydevs will just make a game look like low poly, 144p textured garbage and say it's "old school graphics" because-again-they never played a ps1 game. Like you said, they lack actual style that can make even the oldest games hold up. Aside from your examples, Parasite Eves, Resident Evil, Silent Hill, GT, Quake, Tekken, I could go on but you probably know any I'd list. I dare say that if these games came out and were on the PS1 (I bet you they'd run like shit since trannies can't optimize) they've be mocked and forgotten within a week.