I believe in the practical reality, in which some companies/social media/products become near monopolies, and there's always an additional cost to "not using it", not just "chose this or that and get equivalent functionality".
In general, I find your answer not that different than the right wing "if you don't like it here, just move to another country".
But that _should_ be easier in the digital world than the physical one. That Github has become such a center of everything _is itself a problem_.
Codeberg is one answer to that: they host open source projects and also provide CI to those projects on an as-needed basis (decoupling the service from financial constraints by limiting their audience and therefore their costs to provide this service). Hosting code forges for particular communities is another way (I think SDF does this for theirs?). It's easier today than it ever has been in the past.
If we just say "I have to use the monopoly because it's too expensive not to" than we're part of the problem.
Permanent bans without a chace to appeal are vanishingly rare in the physical world but extremely common in the digital world.
And I'm free not to use Facebook, as long as I don't mind not having access to specific medical support groups which are only available there.
And Cloudflare, as long as I can stop using most modern websites.
And so on, you get my point.