Since you brought it up, at what point does helping become carrying?

I have my own definition, but even that is vague: Carrying would be when a single (or very small minority) of the party is undergeared and underequipped for the content, forcing the rest of the party to do the entire job. Helping would be when there is a balance of veteran and inexperienced players attempting to fight a battle together.
But, to use an extreme example, what if on an entire server there is only a single person who is undergeared. They ask for help from existing veterans on a battle that they cannot possibly complete alone, but that is completely trivial to a party of veterans. Is this carrying or is it helping?

You mentioned before that you have met promising new players. At what content did you meet them and evaluate their skills? No doubt it was at lower level content that you were helping them with. Were you helping or were you carrying?

In a broader definition, both are exactly the same: One (or more) experienced and well equipped players assist one (or more) undergeared and inexperienced players complete content that they would have otherwise been unable to complete.

I'm not even saying either is right or wrong, simply a matter of degree.