Conveniently ignoring Ireland's injuries in the return game there... Anyway, Ireland were ranked about 6th in 2016 when they hammered ye, Wales weren't number 3 in 2016. NZ haven't played a side that, at the time of the match, were ranked 2nd since the RWC because Ireland or England have held that spot since England's series win in Australia, they played 3rd and 4th the odd time while SA and Aus were swapping between those spots but the highest ranked team they've beaten since the last RC was 5th at the time of the match and yet people are claiming total domination, they're the best side but that claim makes no sense to me at this time... Their test this year isn't the RC, it'll be November and all the factors that went against England in SA and Ireland in Australia (playing away from home three weeks in a row, fatigue at the end of the season against fresh sides etc...) will be against NZ this time.
So in conclusion while you are quick to say you have to beat the best to be the best, which is correct, you are pretty happy to ignore the fact that NZ haven't beaten the best sides after them when claiming total domination of rugby. If NZ sweep their Autumn internationals I'll admit their domination, it'll be undeniable, but I don't think they will.