In Defence of DPS meters.

[Shurrikhan]

There are actually more social negatives if people can't figure out whos underperforming leading to more toxicity and blaming and shaming people randomly.

This. It's far, far higher in XIV than in the majority of games that have ubiquitous parsing.

There's no point in telling a guy, "You know you're doing half the dps the other damage-dealers are doing, right?" when everyone has those same numbers. Where parsing is ubiquitous, the conversation efficiently skips that step. Instead, people switch to observation. We check to see if they seem merely distracted or to find out what's going wrong, or at worst just run a quick verbal check before whatever time we'd need full performance on and with time enough to correct the problems seen (e.g. your Fire Mage using Fire Blast on cooldown instead of only on Heating Up or whatever common knowledge issue others might be able to easily fix).