What would they be voting on? No Articles of Impeachment have been configured by Nadler's committee. And I bet the reason they haven't been is that he's scared of what you just said.
At the end of the day, there will be no impeachment of President Donald J. Trump.
They could introduce a bill to impeach, and then sign the discharge petition.
List obstruction of justice as an article, of collaboration with a US enemy, or farting in church.
The articles do not matter. The vote matters.