You can't compare RP services with boosting services.
The one is fully in-game and payed directly with Gil.
The other needs you to give away your account data and is mostly RMT transaction.

I don't want that the Ultimate titles get the same reputation as the mentor crown.

These titles and weapon's are something to show, that you have done the hardest possible content.
But when SE doesn't stop it now then it will continue getting worse. There are now a lot of new player who are used to just buy everything with real money, and I really don't want them to do the same here.