I'd have to disagree Stormcaster with your second point,
I've actually seen it in normal alliance raids that they will get really torqued off at you if you're the RDM and the last man standing and doing nothing to raise people. It does cheeze them off and it can start fights and threaten vote kicks and it applies to dungeons too. And I've also been there when one team wipes or keeps wiping during the raid that the shouts will go up in chats saying Team B will you stop wiping all the time. So it does become a factor.

But I do agree with your general point though.

You don't WANT it that way as an RDM because it means crap went sideways and that's never good.
But unfortunately you will have to do it from time to time if you're doing PUGs.