Is { set, get } pointless in solo gamedev?

Ok, maybe the question was a bit harsh. But I have been coding for a year now, and I see set/get used a lot in tutorials. When I try to implement the same tactic, It feels redundant, not supplying a new feature. I understand that it is wise to use them as a safety in greater code, but I never found a time where I NEED set/get in gamedev yet.

I am 100% sure that there is something that I just don't understand here :)