I personally DID quit tanking in HW due to my opinion of the str meta. I quit the game altogether during 2nd alex for other reasons. I did have renewed interest once they had fixed damage scaling to vit, but by the time I came back my tank was so far behind, and had all str gear since I had switched to drg, I couldn't even queue for content on war because I didn't meet ilvls lol. SB at least allowed me to "reset" to a certain extent, and haven't looked back since.
I think the OP and others are simplifying the view of the community a bit, certainly there were some trollish "grow up" type statements, but even most of those people would make exceptions towards people learning new content or learning new jobs in general. Asshats will always be asshats, of course, but the vast majority of people simply play along because people are generally non-confrontational. Even if they have a problem they aren't likely to voice it. (although, people can certainly be more confrontational thanks to the anonymity of the internet)
That being said, if you find big pulls stressful it won't be any easier in raids when you're getting your face smashed in, out of CDs and sitting on 2k health hoping to the Twelve your healer saves you in time. So maybe tanking is simply not for you, at least not at a high level. You said you only tanked to help your FC anyways, so unless your FC is the one grieving you about big pulls I don't really see why you'd stop tanking for them?
At the end of the day, what's fair is fair. You don't like big pulls? I don't like small pulls. We are each entitled to our own opinion. I agree with others about the meta being pushed into DF content, and that was certainly one of my original complaints about the str tanking meta at the time. But at the same, I understand and accept it for what it is. If a healer doesn't want me to do big pulls I won't, or if we fail a big pull I always say it's "my bad" first (even if it's not). It's simply about trying to accommodate what the community expects. Nothing more, nothing less.