Right. And if that happens twice a year and it costs someone 10 minutes to fix, you could've just paid $12/yr to AWS CodeCommit and made money on the deal. Why would you half-ass such a critical piece of infrastructure when there are free and super inexpensive solutions that work properly?
I would not dream of doing it in a commercial environment. I do it in things like hackathons when you might be working with a random group, no-one wants to pony up to host it privately indefinitely, and messing around with permissions on AWS and registering everyone is a pain in the ass.
Share folder, git init --bare, done. Most people have Dropbox so its super easy.