I fully understand what is commonly meant when people say the word selfish. My counter is that common meaning is antithetical to a consistent use of words, and that it's not just a "hmm, that's weird" kind of thing, but a "that's language to manipulate me" kind of thing.

If you already understand that science has no authority on definitions, then there's no need to take a detour where I have to try to figure out how to politely get us both to a point where it's obvious that this has nothing to do with science.
Also, no need to point to a dictionary. I'm not telling a dictionary what to say. I'm telling you(?) I don't even remember who started all this, that there's nothing good or bad about being selfish, and that if you just stop and think about it, you'll see how using that word for that definition is absolutely steaming bullshit, and it's effect is manipulative.

My point is that it is the common use of the world which is openly contradictory.


Addressing poop's example: I don't want to live in a world where someone would see me in peril and ignore that if they had a chance to help me. Therefore I will take certain risks to help people whom are in peril because that's the vision I have for the world I want to create with my choices.
That's obviously a hypothetical, but it doesn't need to be rational, just compelling to the person taking the risk.

***
Do you do things that are good for me?
No.
How wrong you are to be selfish! If you were a better person, you'd act for my benefit, instead of your own.

That's not my usage of the word, that's the common usage and you keep ignoring this point. The common usage is a fucked up language of guilt and manipulation. Just because we now have the phrase "virtue signalling" to attach to the sentiments of guilt and manipulation doesn't mean that it was any less used to virtue signal before that phrase was popular.