There's limits to how much the Democrats can do while Trump is still in office. It's important to go after people in Trump's orbit who we can actually get so that people have wins to celebrate and 2026 wasn't for nothing, but it's also important to make the case that Trump must be removed.
Voters didn't vote for Democrats to try and fail to impeach Trump. They voted for Democrats to get Trump and the government to stop doing the things they don't like (Iran, tariffs, ICE raids, etc). Exposing corruption is one thing. Wasting time on something they don't have the votes for is another.