What’s the point of things like intelligence/wisdom scores, when those are the predominantly characteristics of the player?

While I understand the role of things like strength (you can/can’t lift that), dexterity, constitution, etc. as character attributes, I really can’t make sense of intelligence/wisdom scores.

If a player notices that you can go around the monster, or just naturally has good memory, they’re going to do clever and insightful things even if they have INT/WIS of 1.