"seeking or concentrating on one's own advantage, pleasure, or well-being without regard for others"
Break it down to show all the things that 'or' covers:
Breh, not even gonna get into the way you broke that shyt down. What is the purpose of the "or" if all of your definitions are the same for each sentence breakdown?

If the purpose was for all the definitions to be the same, why not use
AND. Also, notice how you disregarded the lead of the entry because it proved you wrong:
Concerned excessively or exclusively with oneself. You cannot dispute that at all.
You are typing up an illogical fallacy anyway trying to play on semantics.
If you are always concerned with yourself, there's always going to be either an implied or explicit disadvantage to someone else.
Granted, if you have the potential to be a good parent (not abusive, financially well off), but you don't want to give up your freedom (an advantage for yourself), then you could very well be considered selfish.
IMO, being "selfish" is not a bad thing cause everyone is. However, if you are an adult who is, for some reason, concerned with what people think about you, then I could see why you want to be called "selfish".