I don't see what is relevant about using resources made by others, with permission of course. I even pay for them sometimes. But artists or coders or anyone else who has had their work flushed down a digital toilet have -zero- chance of getting paid, or even recognized. The reason is that what comes out the other side is akin to a sewer pipe dumping the whole mix as one homogenized stew.
Now if people want to train on their own datasets that's fine. To be honest, I feel that this might be a self-correcting problem... or perhaps, not a problem in the first place. There's a lot of talk about how "this changes everything", but so far nothing really innovative has come out of it. Will it ever?