If they didn't launch an impeachment investigation, then we would have had the president of Ukraine go onto CNN and say he's launching an investigation into Biden sometime in the past few months, and Ukraine would have had its aid held up for longer.
This impeachment was literally the only path forward for the Democrats once they learned of what was going on. Pelosi, as shown with the Mueller report, was extremely reluctant to do something like this. But now that the impeachment is in full-swing, they are at least putting forth the kind of effort that shows how serious they're taking all of this.
No one ever thinks about this, including the media. It's all a rush to go after the most deplorable pieces of shits, get them on camera, and have them spew nonsense. Then they project that nonsense onto the "average" american and how the country will revolt against impeachment, so they can further concern troll.
I think people like this think they come off as smart, but in reality they're myopic idiots. There's literally tens of millions of Americans who don't get considered here who would be just as mad if impeachment didn't happen that could've cost us major down the line. Not to mention Trump having free reign to continue his crimes. We saw how quickly he moved on Ukraine after Mueller testified.
Impeachment isn't a dangerous game. Not impeaching was always the most dangerous game, short term and especially in the intermediate and long term.