The reason people cite when defending Github usually isn't the repisitory hosting itself, but the extra features like oull request management and issue tracker that also generate massive network effects by enabling the same accounts to participate in all public projects. Github is nore of a social network posing as a development tool.
Also remember "git" is decentralized itself, you're supposed to have your git repo locally too, if PR's, or issues or comments are "alpha" your code shouldn't be affected by it at all
Im personally down to try alpha software usually, i just havent found the need to retrain all my muscle memory to not use GH yet, as much as I hate it's owned by microsoft nowadays.
They also do offer pretty good "free tier" services for CI via Actions that otherwise you'd need to pay yourself
Also, I moved about 10 repos to a private Forgejo installation with pretty average (non-trivial) GH actions workflows. Zero repos has workflows running oob (java, .net, node). The moat is a bit there.
A feature, not a bug. If I go to a website meant to distribute source repos (git, etc), I expect them to be FOSS. Also, the title mentions 'EU Open Sources [...]' so this is irrelevant to the topic at hand.
Either way, perfect is the enemy of good, and this is good. You can find hypocrisy or lack of perfectionism anywhere.