People who oppose a parser are just the same as people trying to police language because it can be "offensive and used to harass".
I mean for real, guys, put your feet on the ground. Anything can be used to hurt anyone from chairs to powercables, napkins and oxygen (breathing kills you :c), a lala thrown at your head, a glock or a clock. What you want out is the, indeed, problematic people who use any tool to harass you.
It's very interesting to see what number did you hit and why, watching a graph of your dmg, a log of your rotation, the damage you took, comparing variations on rotations to see which is most benefitial.

Then again what it's not acceptable is a i205 pulling 400dps on Faust or someone not being able to kill Bismarck's carapace when you can do it half assed. Just, nope. If you want a carry, ask for it. Some will do it free, some will ask gil from you.

I'm on ps4 and I want a goddamn parser. I want to know how do I do in every fight and what I could do better, and asking people to parse me gets annoying sometimes. I couldn't care less about ego stroking, I want to do better to clear stuff more efficiently and help people easier.