I personally don’t think the lack of art is holding people back but rather the thought of “I don’t how to x now, so I can’t x ever”. we never put it like that obviously, but we find ways to not even try to make something.
I personally thought that there was no point for me to learn how to code before I had made some models that I could use first. but since I didn’t know what they would be used for I struggled to stay motivated to finish them. it also escalated where I “needed” more models and they “needed” to be of final quality. but then I needed to practice more to get that quality and so on.
I finally got out of that mindset when I was told from 3 different sources that you should do the gameplay part first (where the graphics are as bare bones as possible) then when you are basically finished with that then you can do the art.
I have also seen people say “I would make x but I don’t know how to code”. I don’t know for sure but I doubt that they have tried to learn. it’s a lot easier than people think (you don’t need to learn C++) and there are also engines that don’t require coding (and they would probably know that if they looked).
that being said
I do think an art resource would be good to have. part of it would be so people wouldn’t have as much of an excuse to not try, but also for the people that can’t learn to make art for themselves (either because they find it to dull or just don’t “have what it takes” to do art).
it would probably need more time since art is the thing that takes most time in game development and since they would be a bit more general there would probably be more of it to make. I also think you underestimate how much time it takes to make a 3d model. for a professional it takes a week to a month depending on complexity (and since fat is pretty complex to make I would say it would lean more to a month). I’m pretty sure most people here don’t have time to work on it full time as well.
I don’t think that we would have a glut of unoriginal stuff or anything like that. if we had sprite sheets for platformers (that people know about) we might get something other than jrpgs or textadventures. there’s also enough of an incentive to make your own art (or at least modify existing stuff) I think. take EXPAndroid for example, I don’t think that the art needed for that game would be made for a generic sprite sheets.