First of all I don't know why you're so concerned with the achievements.
They're designed so people who want to aim for them and claim cosmetic rewards or just a higher title in game.
I also enjoy the fact that they "FORCE" me as you would say to do things I usually wouldn't ever use or do; Granted that it may put myself and my team at a disadvantage when I have to rebuild X parts in y seconds of destruction as a gunner but it's long term goal is to "train" and "educate" players in what high level or even competitive play can be like and that's why I"m confused in why you're angry about this?
If you're top the type to learn or try new things then simply don't do the achievements? Nobody is forcing you to do them although the level progression is tied in together with the achievements it's basically a quick buffer for most players. Example being If I see a level 11 Pilot I can be dam sure he knows what he is doing and won't have any problems, just like having a level 7+ gunner I can be sure he knows what ammo to bring with him for each gun to be useful as well as knowing how to shoot each gun.
That's how I view the achievements in this game compared to other games; the view being that it's an extended tutorial in a sense that it makes you use combinations of ammo/tools/guns and tactics you normally wouldn't.