The GOP had to adjust itself to Trump's critically damaging personality disorders while propping him up in their front store window showcase as the best thing to have ever happened in the history of America, all while demeaning themselves down into the gutters and sewers, leaving their ethics and morals behind them in order to commit to an enormous failed effort at controlling the damage that Trump was causing simply from being his simplistic minded authoritarian self. Ergo, as you've mentioned, everyone else with a higher level of intellect than Trump needed to be dumbed down to Trump's level of stupidity or lower and fake things up so that Trump could prove his assertion that in any room he enters he will be the smartest guy there.
The tragic beauty of this policy is that millions of conservative Americans were already dumbed down for Trump to scam his way into their hearts and vacant minds. And here we are, most of us shaking our heads at what the GOP has become and the folks who are members of the GOP shaking their heads back at us in a state of defiant conditioned stupor refusing to acknowledge what a mess they've made of the party in order to support (among so many of his other crimes) a known adulterer, tax cheat, law breaking thief of top secret gov't documents and Shit-Stirrer-in-Chief of the Jan.6 insurrection.