Why asking people what is and what isn’t wise, the right thing to do, selfish, or pointless, is pointless.
It’s only their idea. It’s how they see it. It’s probably also how the majority of people whom they grew up with (among) see it.
That a certain person told you that something is wise, or stupid, the right thing to do, or the wrong thing to do, or selfish or not, or pointless or not, etc., doesn’t mean that this thing automatically is (or isn’t) wise, a good move, selfish, or pointless, etc.
It’s only their idea. It isn’t some universal truth. You can always have your own opinion and disagree.