I can't wait to be super angry that I managed to jump perfect in training round and then jump horribly in qualification

Just kidding...it's not bad idea, because when there is big competition and you don't qualify then there is lot of waiting before your next jump which is immediately another qualification...I noticed I jump pretty bad when I have to wait so it's hard to win next qualifications. Usually this is solved by logging off the competition and quickly jumping in practice mode and then re-entering.
But also consider that this would make all competitions take more time.