I believe shoestring fries are just too small. You eat the entire fry in one or 2 bites. Now, you take a bite out of a steak fry and you have much more potato, and more fry.
If I wanted a whole potato, I'd eat a baked potato. Crispy shoestrings is what make fries unique.
Shoestring fries are easy to eat, they have the texture of actual fries, and they're packed with flavor. Steak Fries are kind of annoying.