kzadur: Of course they do. There are tons of trophy hunter sites. To some that's the only reason, I am totally sure of it. If not for the achievements alone, than they stay way longer to get the 100% or a platinum. Even if it means to keep going, despite having any real fun with the game anymore (don't ask me why though).
There are even people who pay others to get your achievements... And people who earn money that way.
Another example: There are people, who don't speak a word japanese, but they get a platinum on VN's on PS4 (in only a few hours, skipping all text). Tell me, what they are looking for, if not for achievements. Guides are written with directions, to keep the answers going.
And to be honest - achievements are adding a bit of value to a game. If I really like a game, I might consider staying longer to get them all. Though that's happening not so often anymore.
Playing game past having fun with it just to get an achievement - I am a little bit guilty of this myself, Shadow Warrior 2 is a quite decent game for me, but playing it a 4th time in a row to get all achievements for it (stuck at 96% rn) is really not fun anymore thanks to the OP weapons i got.
"There are even people who pay others to get your achievements..." And In a weird way, I understand the logic behind it.
You want it all, but you don't have the time for it? Do you have money? Well then ... anything is possible my good sir. And that is the way the world works, and in reality , it's not much different to any other alternative way (legal) of making money, it's just different imo.