People keep saying people bring up numbers in DF (dungeons) and for the time I have been playing since beta I have rarely seen this happen maybe it's because the people I get generally try ¯\_(ツ)_/¯ . I won't say it doesn't happen but people act like it's some common occurrence. The only time I would say people bring it up often is when they die to enrage or not meeting a DPS check in extreme primals or raids which is fair because the blame will be on the DPS if your not progressing on the fight due to DPS. It seems people are forgetting they are playing a MMO with other people around them.
The person who may not be performing very well and potentially causing wipes due to not doing enough damage might be having fun but they are not considering how the other people within the duty feel at all. Someone mentions being happy after clearing it after numerous tries but whats says the other people are happy as well? The amount of people I see chat about how horrible something went even though they cleared it but they would have preferred not having numerous silly wipes. When I enter DF content I try my hardest because I don't want silly wipes happening such as not meeting DPS checks and I want people to have a somewhat smooth experience.
There are some users who would love to know their DPS mainly on PS4 and based on this thread people would like it. Yes, I know forums are not the majority but I went out of my way to ask some casual friends of mine in a LS and some other places if they wanted a parser and majority said yes they wouldn't mind it. Do you know why they said they wouldn't mind? Because they have nothing to hide with their DPS they know they play at a level which is acceptable to most people and we are not talking "raid level" DPS.
I said it earlier in this Topic. If you are getting harassed or being told your DPS is too low instead of having a fit just improve a little its not that hard but people who are against parser make it seem like it's so much work but its not you just read up on a rotation and what you do after the Opener simple. Learning your job doesn't make you some elite or hardcore it just shows that you understand your job to a level that most people would like.
Just to help those of you out why not head over to the DPS section of the Forum and see how much it provides. It will take you a long way, some of those threads have basic and advanced rotations people can use where you still doing ok DPS with Basic.
DPS Forums
If you know almost every classes skills its quite easy to have a close overview of the entire party I do it all the time and I can easily determine who is doing low DPS there has been plenty of instances where I forgot to open a "certain" software and my guess is generally always correct when I do open it after a few wipes but what you said is understandable. Some people do act that way but I wouldn't say that's the majority but I think a parser would help because if they see their DPS isn't that great chances are they will try to improve it.
I will say though I have noticed something with the FFXIV community and SE has noticed it as well we are very competitive. They are adding leaderboards to content like Feast and soon to be Deep Dungeon. This is just a theory but would perhaps parsers have the same effect because people would want to be the "best" and this in turn would increase DPS in DF? Then you can say the issue would be people wouldn't focus on mechanics but I don't think that would be the case because people would still want to clear content.