Years ago, when I was talking about a writers group I belonged to (I was the only published author), my father said to me "Why are you helping these people? They're your competition."
Of course I knew they were my competition, but it had never occurred to me not to offer help and encouragement to other writers, because that's the way it was done in the SFF community. (I have received kind support from authors further up the ladder of success, and I can never repay them, except by modeling my behavior after theirs.) Not that everybody helped everyone else, of course, because who would have the time? But that there was a tradition of being helpful and supportive when there was time and opportunity, and a new writer looked promising and didn't demand help and support, which is the best way in the world to get a "No, I don't have the time."
But now, with self-publishing so easy, the number of new writers in the field is so overwhelming, it's impossible to offer a helping hand to more than the tiniest percentage of newcomers. And, as always, those who make demands automatically go to the bottom of the list.