Not always. Back in the 2000s when they did one card a month most of those cards were pretty fuckin stacked.
But the company got bigger, started doing more non PPV cards and lots of international cards. They would sign regional level talent to promote the international cards to the locals and those guys held onto spots.
WMMA added a plethora of dead weight
TUF added a bunch of talented fighters but also some Cody McKenzies, same for the international TUF like tuf Latin America 1,2,3.
You got Yair but also quite a few

The bigger the roster gets the more non elite fighters they take on.