Swen already said why in one of the videos. He thinks its more interesting to play a game and get "different stuff" rather then "always" get the same stuff.

So its a weird binary choice for him, although those two binary options dont need to be like that.
And despite the fact things dont really work that way which is further worsened by number bloat and nonsensical randomization of equipment stats.

Its not like they are really trying to make the best game possible. They made the game that will sell a lot and they succeeded. With mechanics for the... masses?
(nobody knows what that even means)

You want something better, hope someone makes a mod.
Instead of fantasizing how one of them will come over and tell you you are right and they were wrong.