Why should git have a mediocre ticketing system instead of getting out of the way of dedicated ticketing systems?
Small personal projects just need a text file with a Todo list, large organisations might need something super heavy weight like Jira. If your VCS has a ticketing system it’s going to be dead weight for a large chunk of users, because there’s no one-size fits all solution.
I don’t think you understand what the word bloat means.