The cost of acting as a percentage of budget or revenue is highest for indie studios because it's done at fixed union rates without the variability in the number of hours that can be spent on it you get for art and polish coding. It is likely to take over the stuff we actually like first, because, among other things, small studios are more willing to take risks and accept quality compromises in new technology acquisition.

A lot of the non-mainstream stuff only exists because the creatives in the mainstream take the capital they earn there and shovel it into niche stuff.

Excluding artists from the mainstream wont just hurt the mainstream. It will starve the niche too.