While I agree with the spirit of your statement "people are afraid to run their own software", I feel like this assumes that people are the ones choosing the software they run. I wish my teams could run more things ourselves, but are told no by our systems and infrastructure staff.
Any self hosted service in an enterprise means that you're dealing with all the headaches that come with that including: backups, user/role creation and mapping maintenance, infrastructure scaling needs, OTEL or other monitoring, etc.
It's an easier decision for VPs to pay GitHub anything less than the man hours required to execute the above tasks because it's a "not our problem" fee.
Any self hosted service in an enterprise means that you're dealing with all the headaches that come with that including: backups, user/role creation and mapping maintenance, infrastructure scaling needs, OTEL or other monitoring, etc.
It's an easier decision for VPs to pay GitHub anything less than the man hours required to execute the above tasks because it's a "not our problem" fee.