Personally, I won't miss these games either, but it just seems like such a slippery slope to normalize achieving societal/political goals through exerting pressure on infrastructure companies instead of through democratic means.
I totally support this type of pressure being exerted on companies involved in editorializing and providing an audience (e.g. I don't think Valve should be required by law to carry any form of content, just like a publisher can't be forced to print any content it doesn't agree with). But infrastructure, due to being both fundamental to doing business and generally living in a society and very often being at least regionally monopolistic in nature, should be open to anybody that's acting within the law.
And conversely, if something seems ethically or morally unacceptable to a rule-based society, what ought to change is the law.
That's all assuming a functioning democratic and political process, of course, but it generally seems to be possible even in the US, with its strong protections of speech, to limit certain types of speech under obscenity laws, so I don't really get the desire to outsource this inherently political process to private corporations.