I think their ideal customer would not ask "complicated" questions like "what plant is this?".
Hey, if you knew what it was, you might know it wouldn't grow in your zone.
I noticed that they tend not to be specific about the cultivar, and sometimes event he species was vague. My guess is that they want to market things as generically as possible. If they don't say exactly what it is, they can do legally what I think Hirt's Nursery does intentionally: market things under a fancy, expensive name when they are the cheapest, commonest variety that exists.
I'll become less cynical about that kind of practice the first time I see a big company make such a mistake that favors the CUSTOMER.
No-Name labels let them market truck-loads of "whatever" with a generic label like "perennial for spring/fall". Hard to sue them for misrepresentation, as long as there is SOME spot on Earth where they might come back from their roots in a good year.
Even then - say they sell you a total and obvious annual as a perennial. If you don't have a DNA lab or skilled plant ID experts, if the label doesn't say what the plant IS, how do you know it isn't really a perennial? Maybe "it just died".