No doubt that's one of the reasons.
But I suspect an even bigger reason is that an impeachment + a conviction means he could never again hold Federal office, according to the Constitution.
Peloschumer know that they will be overreaching so egregiously starting just days from now, that huge numbers of people who voted Biden are going to have Buyer's Remorse and look favorably on DJT running again in 2024.
Sorry. The idea that has been floated since November that he could or might run again in in 2024 is utterly preposterous.