Could you please link the live letter where he said that, as well as where the WoW devs said that? I'd like to know the context of the statements given. It's quite possible that one was talking with near sole regard to the JP playerbase, particularly the
Koike Incident which is a very solid thing to consider regarding adding anything kind of feature to a game. Something that must be considered though is that something like that could have happened parser or no parser. The DPS harassment was just one of many things they did, and even without an official parser, she still would have been harassed. None of that has anything to do with not wanting to party with people based on performance in party finder or vote kicking in duty finder.
Even then, I'd still say your own experiences are anecdotal. I don't doubt people are dumb and votekick for dumb reasons, but I would argue most situations where a votekick happens, a votekick would have happened anyway.