Right I don’t see how it’s ableist or an insult. She didn’t say it like it’s a bad thing or associate it with any assumptions. It’s not like she called him “Legless Wonder and his Half Pint Segway” or questioned if he can govern from a chair. It’s closer to calling him Governor Brown Hair. Neutral. Silly at worst.
You make it sound like discovering agriculture is child’s play. It probably was the brightest minds of the day who figured stuff like that out. It was revolutionary. The entire society had to be redesigned around growing enough good potato to get through a winter.