One thing I will say that I have noticed from players in regards to parsers that does kind of irk me, is that some players will pick what they consider to be the best rotation based on parser results off Youtube or Reddit and hold that as the "One way to play the class." This mind set is limiting in my opinion and I think that might be a factor as to why many dislike parsers.

I do think, however, that parsers can and should be used to encourage players to experiment with their jobs and find new better DPS results. I for one would really appreciate a tool like that as I play on PS4 and don't have any FC buddies that can Parse me as my FC is made up of IRL friends. I find myself doing a lot a research and trial and error with my job because of this and it would just be so much easier and faster to know if I am holding up with my DPS if I had a personal Parser.

I think adding parsers you can use on others might be a step too far, at least at the moment, but I see nothing wrong with having personal ones.