You are totally right.
The parts that “we usually don’t use” [whatever *that* means] kicked in and took up the slack.
The only deficit I never shook was anosmia.
To this day, they’re not even totally sure I have *that* as my sense of taste is far more acute than someone who *can* smell.
I may be smelling things perfectly normally but some “wire” that tells my conscious brain that I am is still “unplugged”.
Several years ago, dear hubby sniffed some chicken salad that I thought tasted “a little funny”, pronounced it fine and dandy and then got to watch me go through a week of food poisoning fun.
Ow.