re: Neurologist said he is considering filing with a judge to remove my FIL from his finances

There are many bad actors behind every bush. One of my old teacher, who taught many BR kids, keeps getting targeted by people telling her they are her grandson, and he needs $5k to get out of jail. She calls an uber to go to the bank, but so far, a neighbor has caught it.

Scammers are everywhere. The Doc is trying to protect your wife's interests from strangers, or bad acting family who feel entitled.