Well, it’s pot roast. So you generally want a “cheap” cut of meat. “Choice” quality is middle of the road. It’s not “Prime” but it’s better than “Select”.
The beef industry here is weird…but I digress
A “cheap” cut of meat is gonna have a lot more connective tissue, which would be bad if this were a steak, or something cooked quickly to a desired temperature like medium or medium rare.
But for a braise, which pot roast is, the cooking time and lower heat allows that connective tissue, collagen, and everything to break down, and make the meat super fall apart tender, as well as adding that delicious gelatin to the sauce, making it rich and lovely and coat the meat beautifully.
But yeah, I mean, if you meant cheap cause it’s “choice”, that’s pretty standard here.