Did you actually think it through?
Not really, no
OK, roll back the clock to 3.2.2.... You are watching a YouTube video and all is well. Why exactly would you suddenly decide to lock orientation in the middle of it? You had to be doing something... moving the iPad at the very least. More likely, you noticed it was rotating and you didn't want it to. So you held it where you wanted to and locked the orientation.
In my humble opinion all of that is really a much large "jarring experience" than having the video pause while you lock orientation. Is video turning 90 degrees really part of a good "user experience?" I think not. Is pausing for a second or two a big deal while you do so? I REALLY think not.
I can't really argue with your reasoning here. I still think in the end people are more upset with the fact that Apple completely changed the behavior or the switch without giving the user any option. Maybe a more interesting poll would be to see if more Windows or Mac users are upset by the change. Maybe Mac users are more used to this type of action, I don't know (and despite how that looks I do NOT mean that as a slight towards Mac users).
Anyhow, as I have said before it's not like a few minutes spent jailbreaking can't get the switch function back. As long as the option is there I can't being too upset about it.