Git is also FOSS and is not owned by Microsoft / Github. Using git doesn't really "give" Github anything other than a bit of convenience and brand linkage. If the industry wanted to adopt a git replacement I suppose that Github's use of git could be a hinderance, but honestly the coupling is pretty loose.
Also, I worked in consulting for a few years and while Github was common, so was Azure devops (ironically also Microsoft, though) and one project used BitKeeper. Github might be dominant, but is very far from a "monopoly" in my opinion (I don't know if anyone used that word but if that's not the concern then what's the big deal?)
Also, I worked in consulting for a few years and while Github was common, so was Azure devops (ironically also Microsoft, though) and one project used BitKeeper. Github might be dominant, but is very far from a "monopoly" in my opinion (I don't know if anyone used that word but if that's not the concern then what's the big deal?)