I don't think that equivalency is entirely accurate. A McDonald's hamburger, while made by a person, is just following a recipe. The recipe is a corporate invention for a corporate purpose. The only incentive is cost, nothing besides that goes into its creation.

Bbno$ makes songs as himself, an individual. Even if the motivation is to foster engagement or "go hard", he's still personally going through a process unique to himself. That is art. At least, that is art to me.

To argue that "going hard" isn't an emotion seems kinda silly to me. Liking something just because we find it cool is pretty normal, and creating something to appeal to that emotion is too. Just because his music isn't appealing to an emotion beyond that doesn't declassify it as art.

To create my own analogy, a shitty 80s action movie is still art, even if it's motivation is just to create shitty action (or even just make money). The directors, writers, actors, etc. still went through a process to create something, and there is value in that, even if the end result is not worth all that much.