But yes, sure, they're all for it. Trump is all for it. All Republicans are all for it. Right.
The reality is that you can convince people of something they don't want to believe otherwise. To paraphrase Dorothy Parker's quip paraphrasing the old adage, you can lead a horse to water but you can't make it think.
If people actually, really want to believe that the Republican Party is actually, really for keeping pre-existing conditions despite having voted against them 60 times and filing a lawsuit against them and despite Mitch McConnell saying he wants to cut it out if Republicans keep full control, then you simply won't be able to make them understand reality.
But if Republicans somehow do keep control of both houses of Congress and vote to eliminate pre-existing conditions, no whining is allowed or cries like a stuck pig that you didn't see this coming.
Reality has a way of making itself known.