Trump can't be removed from office. That's the crux of the issue. He can only be impeached for the sake of history. That does not mean he shouldn't be impeached. It is either right or wrong to impeach him, whether he can be removed or not. But the fact that the criminal can't be removed, must be considered.
Since he can't be removed, would filing impeachment papers increase his chances to get re-elected, thereby endangering the country more than if he hadn't been impeached? If so, that is something to consider.
There's no way to know for sure. But the discussion and the thought process needs to happen by a group of experienced lawmakers. All consequences need to be considered. Lots of what-ifs. Lots of heated discussions. That has to happen. That's how you arrive at a consensus.
I'm not saying whether one way is better than another. I don't have the benefit of sitting at a round table with experienced lawmakers to hash out all the concerns and weigh the choices against the consequences, and the obligation to impeach at the heart of it all.
But sometimes in life, you have to forego doing what is "right" at this time, so that something "right" can happen later. That may not be the case...that impeachment helps Trump. But it must be considered. History must be reviewed.
In the end, the consensus of our leaders may be that impeachment is the right thing to do, with no consideration to what the future may hold. That's why we elect these leaders. To make these hard decisions, using their education, wisdom, and experience.