Good point! And I got caught up in it.

No, Impeachment Did Not Backfire or Enable Trump
by David Atkins February 2, 2020, Washington Monthly

Could Trump immediately begin to cheat in similar and worse ways, once the craven Republican Senate acquits? Of course. But he would already be doing so anyway without hesitation if the whistleblower had never stepped forward, and if the House had never made the effort to impeach.

It was worth it. The only way to stand up to a bully is to punch back, and history would not have been kind to the Democratic majority in the House had it avoided doing all it could to hold Trump accountable on the basis of political expediency or fear of emboldening him.