If you were to compile a list of people or groups who Trump should apologize to for saying dumb things, it would be hundreds, if not 1000's.
But if you want to put style over substance, then that is your business. As much as I dislike Trump as a person, a POTUS Warren or Sanders is a million times worse. A united front against the socialist is needed if we want to prevent that. Holding my nose and voting for Trump in November. And unless you want Bernie or Elizabeth confiscating your 401K, I suggest the same.
Certainly, it's your right to vote for Trump in November. I'm not saying you or anyone else shouldn't -- certainly not because of this one incident.
You mention style over substance. As far as I'm concerned, Trump has neither. For the most part, he has been a failure as president, IMHO. He did not keep his campaign promises, particularly when he enjoyed a Republican majority in both houses of congress. And I don't see him doing anything differently in his second term, particularly if the Republicans lose their majority in the senate. About the only difference between Trump's second term and his first will be that he will have a different scapegoat for his failures -- a Democrat-controlled congress.
About the only thing Trump *might* do in his second term is veto any BS legislation a Democrat-controlled congress passes to further their stated agenda items -- gun confiscation, Medicare for All, what you mentioned about the 401(k)s, and so on. Notice I said *might*. I still don't trust him to protect us from the Democrats' hare brained schemes. I have yet to see him veto any legislation that has come across his desk, particularly those spending spree bills. And with a Democrat-controlled congress, he may feel there will be enough Dems to override any veto he does make.
But now I've managed to get this thread off topic. I still say Trump was wrong to say what he said and he should apologize. But I'm sure my opinion and those of others who feel the same won't make a dent with him. So no more from me.