Steam has no competitors because nobody is competing with them, not because they are forcing nobody to compete with them.
Steam isn't abusing their dominant position to prevent competition. Other companies could make their own storefront and compete with steam. Nobody does in a way that's actually comparable to steam.
Steam has a monopoly, but it's not because steam is actively keeping it that way.
The whole purpose of art is to be an outlet for expressing ourselves as human beings. It exists out of this need for expression; part of what makes a work worth appreciating is the human person(s) behind that said work and the effort and skill they put into making it.
This is completely and utterly your own opinion, not a fact. I know several people who can't draw for shit, due to various reasons, but now AI allows them to create images they enjoy. One of them has aphantasia (They literally cannot imagine images).
This is basically trying to argue there's only 1 correct way to make "art", which is complete and utter bullshit. Imagine trying to say that a sculpture isn't art because it was 3D printed instead of chiseled. It makes 0 sense for the method of making the art to impact whether or not it is art. "Expression" can take many forms. Why is this form invalid?
Why would anyone want toxic waste in their backyard?
It's not toxic, nor is it in their backyard.
Not to mention that the search is mainly conducted by companies, which have a vested interest in not making all the issues transparent.
What issues?
It’s genuinely not easy to find a location where anyone would be willing to claim that it will remain unaffected by geodynamic processes for millions of years.
Maybe they are, but it's not "absolutely zero" like you said.