Just because you can, doesn’t mean you will.
Just because you can’t, doesn’t mean you won’t.
Just because you didn’t, doesn’t mean you couldn’t.
Pondering who can and who can’t is fruitless and irrelevant. History has proven that we’re terrible at judging ability in others, and especially in ourselves.
We brag about the things we can do, bemoan what we can’t, and make excuses for what we didn’t do. All that matters presently is what we are doing. Past results are not the best predictor of who will and who won’t- current actions are.