Imagine I really like hamburgers. I might choose to $5 each week on a burger and be happy with the quality of a burger made by people who only make burgers.
The alternative is spending $4 a week so I could access a buffet with lower quality burgers (after all, it’s not their speciality) but also hot dogs, sandwiches, poke bowls and sushi.
Trying to convince me that the buffet is a better deal just because I have access to a wider range of foods when all I really want is a burger is not a winning argument for me.