Exactly. Impeachments are political trials with legal trappings. Conviction in a political trial relies not on a preponderance of evidence but in numerical superiority of voting senators. And dhimmicrats NEVER hold their own accountable.
Johnson wisely knows that impeachment is a pointless exercise until and unless we regain control of both houses (rendering the exercise moot).
Impeachment is more comparable to a criminal trial in which the standard is proof beyond a reasonable doubt.
I think what he is implying, is that he wants to convince the people of the corruption of Joe Biden, otherwise it becomes a political thing only. When that is accomplished, then they will impeach him, knowing that the Senate will not convict. Then when the 2024 elections come around, a better informed public may award them both Houses of Congress, as well as, the Presidency.