I agree with this take in general. But in labelling a product "ground beef", a consumer would consider the ingredients to be beef that is ground. Separating the meat from the fat in trimmings is good (use more of the meat please!), but the process is not grinding. If the market determines "heat-separated ground beef" (or whatever) to be less appealing, then perhaps they're right that it should demand a lower markup.
It's about nomenclature, not safety.