Can't answer something that has no reasonable answer really, the only argument they have is possible harassment, but that tends to not be as bad nowadays as it was early WoW. Was playing WildStar and one of the DPS was doing half the damage of the 2nd in lead DPS, but no one yelled at him even though we ended up wiping on the final boss a few times due to that last DPS check. Harassment is going to be a thing parser or not, jerks are going to continue to be jerks with or without them, it's just with parsers they'll have another way to be jerks. Oh, there have been more than a few times someone was bitching and poor DPS when they were doing the lowest in FFXIV, it's always very amusing.
