No rhyme nor reason for it, it just happens.
Exactly. Even stronger, we get trained to the confidence of taking off, and knowing that the landing will just happen. How good/poor a landing, nobody says. After a while, one doesn't bother. Landings ought to be perfect, but we all know they aren't always. We still manage to survive. Much like knitting, or sex, or a cooked dinner. We all do the best we can, and succeed sometimes. The crux is to avoid utter failure.