The paradox is only in your head. Do not confuse the process of learning a skill and practicing it professionally. The line between the two is beyond clear.
The question you refuse to answer is at what point should incompetencey be judged over effort. Little timmy who was always going to be a good teacher has now lost out because you the gave the position for the university place to little Johhny who everyone, despite all his everyone knew he was going to be a terrible teacher.
There is no benefit in always being praised for your efforts if you cannot deliver the goods.
I answered that and reiterated it. The outcome can be judged (and it is) when you do it professionally. Everything I said about evaluation on the effort was from the start about the learning process (the topic of this thread) and psychology in the critical formative period of young human’s upbringing.