Someone else already effectively rebutted most of your points, but I'm going to throw in my two cents.

Parsing virtually only comes up as a topic of discussion in premade parties, due to this games stringent harassment policy. Parsing is actually incredibly widespread; You're constantly placed in parties with people who use parsers, you just aren't aware simply because almost noone talks about it publicly. There is no threat of a growing problem around parsers, as SE's harassment policy has proven to be extremely effective in curtailing parser related toxicity.

Quote Originally Posted by Tonkra View Post
"Without" data, you sound like me - in real life i am working as a performance marketing manager handling tons of data and numbers every day.

You sure you are playing the GAME or the numbers? Shouldnt people play to enjoy RP / the world / the experience / the battle instead of DATA.. that we shouldnt have access to? (in that form)
Just saying.
I work with data professionally as well, including frequently writing programs which parse and convert between various data formats. Fortunately, someone else has already written comprehensive software for us on this game, and we can simply reap the benefits as the end-user. Again I'd like to emphasize, the game gives us access to this data already, it's simply the role of the parser to ingest that data, present it in a way that is human-friendly, and help us draw conclusions about said data.

You are not the grand arbiter of what people are allowed to find fun. People are allowed to like different things.

Quote Originally Posted by Tonkra View Post
I wonder how i ever could feel that i have to improve myself at certain points without a parsing tool...monitors controls what i and how well other players are "performing". so i dont actually know how that is "needed"... everyone feels if they perform poorly. There are tons of tutorials on youtube how to do your rotations, if you dont have a brain.
I've spent hundreds of hours teaching other players how to raid, and I can emphatically tell you that the vast majority of people are incapable of assessing their own performance internally, especially when they are newer to the game. If you have no established framework for what 'good' feels like, it can be pretty difficult to assess how you are actually doing. Analytical tools aren't necessary, but they can be really helpful for some players.

Quote Originally Posted by Tonkra View Post
And yes, i am "aggressive" against this kind of behaving ...

If you cant accept how the game was designed or you can not accept the EULA quit the game, easy as that.
Calling people pathetic, stupid, or telling them to quit the game is also against the games ToS. You seem very selective about which parts of the games ToS you follow.