Seems like a dumb move, imo. Even if it were successful, all the republicans who've had enough of Trump would probably have no problem supporting Pence. And if it doesn't work, just another reason for people who think Trump has had a raw deal from Democrats will just double down on their support, even if they were wavering.
Trump should get voted out, not 'removed' by some other means.
Yes, it could be dumb but it also could be smart because of the message it sends on the fact that Trump can be considered a candidate for the 25th. amendment. And it's also strengthened with the visible move away from Trump by a few GOP senators already.
Big decisions such as this are never clear cut dumb or smart. It also provides a solution for a psychopath never accepting defeat. However unsatisfactory that is for Trump.
And the political instability in that country now is so shaky that it could result in violence on Trump's behalf. Larger numbers of extreme rightist would be able to gain the courage that the 13 lacked.