Impeachment was just tried to remove former President Trump twice for serious crimes (we are not talking about lying about a blowjob here), and it failed. Twice.

In the first instance, the House prosecutors proved that Trump used extortion to try to solicit a bribe from a foreign ally that would help him politically. In his defense, Trump's lawyers literally argued that he was right to do so, because he believed it would help his campaign, and him winning his campaign was the best thing for America. Ipso facto, he can't be impeached for trying to help America. Notably, the conduct was not denied. The senate sided with Trump in that argument, so he was acquitted. Impeachment cannot be used to reign in executives who extort and/or solicit bribes, that has been shown.

Then there was the second impeachment. If ever there was a case to impeach a president, it would be one who incited an insurrection. And yet, Senate Republicans slow walked the impeachment trial, then claimed as it was held they couldn't impeach Trump because they had taken to long to start the trial. I mean, when else are you supposed to impeach a president who stages a coup and incites violence at the end of his term? Impeachment cannot be used to reign in insurrectionist executives, that has been shown.

So what good is impeachment? If it is toothless in the face of blatant proven corruption (they didn't even try to deny it) and abject lawlessness, then it might as well not even be in the Constitution in the first place. It's moot.