I wouldn't want to see the pilot lose the ability to dump the plane's bombs. There are some times when you want to have that ability and it's on the opposite spectrum from dive bombing. Run over a target at high alt and have a couple bombs left with an enemy plane (maybe one that's not such a great performer at high alts) at or about co-alt on your six. That's a good time to pickle off those last few and maybe set up for a shallow climb. If you have to use the bombsight, it locks you into level flight. Yes, I know it's only for a couple seconds, but that couple seconds could make a difference. Nicer to just be able to dump them from the pilot's seat.