My parents spoke broken English but this is a new one to me, at least there was some sense to what they said. All this di was give me a headache.
They understand that this is important. There is no "this" in the word choices
What exercise, the puzzle? Anyway, it has to be, it's part of the main answer...
No. Ważny != poważny.
ważny, ważki = important or still valid, lit. having big weight
poważny = serious (no emotions), important (about: problems, ideas etc) but with humans it means showing no emotions or poważny kandydat - a real, serious candidate (one that can win, that has support), ważny kandydat is only important judging by some rule.