Since you've brought this up again, here is what I asked you on page 40 (39? 41? not sure)
I could have answered the objective benefit for you if you actually answered that, but someone else did it for you. But you didn't pay any attention to it from the looks of it.
What are the objective benefits? Achieving the common goal for the majority of the group. DPS checks are the main causes for failures when every one performs their role up to par. Meaning; no deaths, no agro loss, mechanics handled properly. Now what if the DPS checks aren't met and there's this one person doing less than the tanks when it comes to damage? There are some options here:
1) Continue and keep failing, meaning you'd waste time for the entire party
2) Kick the weakest link and take your chances on getting someone who can deal some proper damage
3) Disband the group completely, even if 7 out of 8 actually has a standing chance of clearing the encounter
If you can't comprehend the situation: You got 6 sandwiches, 7 people to feed. 1 of them doesn't work while the remaining 6 work their asses off for a common goal. Who does not get a sandwich?
This does not only apply to damage. Healing and tank cooldown uses apply. You got tanks who claim they're using cooldowns, but not till they're dead. You got healers who claim they're doing their best, but have the healing output of a level 30 white mage. It helps entire groups identify problems within a group. Yes, there'll be victems when this happens, but rather than looking at the negative, look at the positive. If you do get removed from a group because you're under performing, make use of that parser and/or reach out to others for advice and ask what their damage output is (for DPS cases). If someone's just going to throw a tantrum because they got kicked and do not admit they're doing poorly even if numbers state otherwise. You'd be catering to these particular kind of jerks. Either way, even if you're "anti-jerk", you'll never win any argument as the contrary of what your statements are that supports your stance is also true.
As for this:
So you've experienced a certain behaviour. Out of how many posts would this be? If the posters you witness where people are not being mature is a mere 0,1%, does that outweigh the remaining 99,9%? Does the remaining 99,9% have to cater to the 0,1% that's being immature? Or whatever number you can think of. However, you made a statement before not to lump you together with the anti-parser group. Why are you lumping entire communities to the jerk-group?