You seem to misunderstand.
There are 30-plus conferences. The WCC is usually the 10th to 12th best. If you looks at the 18-20 or so below them, none have some team stringing together 10 trips in a row, let alone 20.
Gonzaga's and Michigan State's accomplishment is a completely different type.
Gonzaga plays in a weak league so making the tournament even in an off year is only a matter of not getting upset by the really bad teams and then beating out a handful of competent opponents.
Their consistency is mildly impressive but considering the opposition, frankly not very.
Your reference to the 18+ worse conferences illustrates what is truly odd about the Gonzaga situation. Over the past ~30 years Gonzaga has been one of the best teams in CBB. The oddity is that there is no other team even close to as good in a conference even close to as bad.
It is different when Michigan State has an off year. They still have to go out and play in a league in which the majority (and usually super-majority) of their opponents are pretty good.
But how can that be? A high school team in a weak conference could make the dance all the time in the WCC. Yet somehow, it’s not happening anywhere else.
I already conceded that the HS thing was an exaggeration.
It is only a question of consistently being the tallest midget. Gonzaga has of course generally been more than that, but all it takes to keep their streak alive in an off year is to be the tallest midget or to be one of the tallest midgets and pull off one upset in the league tournament.
That, to me, is not nearly as MSU managing to go .500+ every single year in a league full of competent opponents.
What I can't stand about Gonzaga is that nobody seems to consider the pathetic weakness of their schedule. They play a few top teams early but overall their OOC isn't usually much better than the other top teams. The difference is that the other top teams spend their conference seasons playing good teams week in and week out. Gonzaga spends their conference seasons fattening up on cupcakes.