IME one thing that makes this choice a very difficult one is oncall responsibilities. The thing that incentivizes code owners to keep their house in order is that their oncall experience will be a lot better. And you're the only one who is incentivized to think this way. Management certainly doesn't care. So by delegating the choice to management you're signing up for a whole bunch of extra work in the form of sleepless oncall shifts.

If someone is making the kind of mistakes that cause oncall issues to increase, put that person on call. It doesn't matter if they can't do anything, call them every time they cause someone else to be paged.

IME too many don't care about on call unless they are personally affected.