I am fine with SE not integrating DPS tool into the game but please do legalize the usage of 3rd party DPS meter.

Without DPS meter, i cannot improve myself.
Without DPS meter, i cannot know the '1-2-3' DRG standing beside me is slacking. (illustration)
Without DPS meter, i cannot gauge the miss rate to extract the ACC cap for boss fight.

I mean, tbh, those who uses DPS meter for boasting and to confront fellow DPS mate because they did 20-30 DPS lower can be categorize as a jerk but believe me when i say i see people doing half of what a DPS should be doing in that content with the same gear. These is the kind of people i am trying to exclude in my future raid/duty as they are obviously expecting a carry or do not want to engage in learning to be better.