In many elections, that would be reasonable. The difference here is Trump. We have not had a president who so blatantly breaks the law with the level of support he has while his supporters either willfully ignore it or even support it.
So few thought he had a chance to be the Republican nominee in 2016, including Hillary’s campaign. Then, he stomped all of the other Republicans. Still, people he had no chance of winning the general election, and he won. While it is clear he hates learning of any kind (as evidenced by appointing Betsy DeVos, his inability to pay attention to briefings, etc.), his campaign has had opportunities to learn what works and what doesn’t. If the opposition is not unified on ONE candidate against Trump, Trump will win. The consequences of that are too dire, and this we gotta eat the white bread with Kraft singles sandwich. It’s better than the diarrhea sandwich people keep pointing to.