Here's what I believe:
Every assertion you can make has its detractors. It's human nature, I suppose.
I just don't understand why people would argue for a position which is disempowering, more limited, and less hopeful.
Why imagine that your effort is not going to help you? That you may be the one who won't succeed? That maybe you just don't have what it takes? What benefit could there be in suggesting that maybe you'll try and try and still fail? That work is supposed to be drudgery? That some people are just not meant to be creative, or happy?
If you know better than to answer these questions, you're on the right track.