Because this would create an environment where an ethical alternative could appear. Although, looking back at the history of Google, a cynic in me says the users will lose in the end anyway.
That's exactly like saying "if we remove this dictator form this middle eastern warzone, a peaceful and ethical leader will naturally replace him".
No mate, you'll get no ethical alternative, instead Google and friends will immediately take over the power vacuum left by Microsoft before any start-up can even begin hiring.
[0] "Almost", because I know some large orgs that finally managed to break away, but it wasn't easy at all.
As opposed to the likes of Meta, Apple, Google who operate on the peaceful cooperation and charity paradigm?
Does it look like to you that the other companies got so dominant by not using EEE?
Define "ethical". Depending on the definition, none of the current big companies are ethical, so Microsoft going out of business wouldn't even matter.
And you really need to understand how the world works. Ethical never matters, money matters.
I was thinking about this recently as someone suggested it might be an American thing. But I don't think so - there are plenty of unethical companies in Europe, too. They often manage to exploit some loophole in the law and, say, sell expensive things to old people under some apparently legitimate guises. Or they'll fake car engine tests.
But ethical (=ethically neutral) companies definitely exist, and there are many of them.