It is important for some companies. https://docs.github.com/en/enterprise-server@3.22/admin/inst...
I'm not sure, you'd have to check their pricing pages.
Github Enterprise is $21/user/month: https://github.com/pricing
As best as I can tell, your argument is "Github costs money which is bad" and I don't find it particularly convincing. Companies need to make money in order to continue producing products. That's why Gitlab sells their product too.