The good news is that there's really very few fights that are "zero tolerance" in raiding MMOs though.I never have been a fan of what essentially amounts to 'zero tolerance' in game mechanics. There's too much room for error that has absolutely nothing to do with player skill, latency being the biggest culprit.
To be totally blunt, I find that almost every time people talk about "lag", "RNG", "Broken mechanics", or similar things, they're just making excuses while better players clear the same content. Problem is that there are - naturally - way more non-raiders than raiders, so all the myths like:
"Lag kills you every other fight!"
"Raid bosses are just RNG."
"Raid bosses are always broken."
"You can't raid and have a life."
"Raiding is just about gear, you have to have BIS to do any boss."
"Raiders are all raging kids, you don't want to be in voice chat with those guys"
Just keep persisting year after year, poisoning peoples' opinions of raiding in general.