>>56232888Anon, you're comparing potatoes to beans.
Meowscarada is the best dedicated potato farmer, but as you say being able to get potatoes and milk is also super useful.
This is why you don't really stop looking for good ingredient farmers, there are valid reasons to use both mono-ingredient farmers and diverse ingredient farmers.
Mono-ingredients are great for stockpiling a single ingredient you're short on to last several days.
Diverse ingredients are great for staying on the team for a steady supply of important ingredients for key dishes (Victreebel with Tomatoes and Potatoes is a strong example of that).