i don't disagree with you, but kaido is different from all of luffy's previous opponents, also the fact that kaido can't be defeated in a 1v1 has been (like you said) drummed into us since dressrosa, even more in wano it's a well known fact in the one piece universe, yamato admitted she can't win against him despite kaido himself praising her strength when he only mocked luffy's power.
there are fights that one can't win on his own, even if he's the king of pirates, roger had to team up with garp to defeat rocks, luffy had to team up with zoro and sanji to fight aokiji, and with the entire crew to defeat oars, and the pacifista.
i don't mind luffy getting the last wining hit, but until then he will not be alone.