Well yes, because prioritising personal health is expensive.
High quality, healthy food is much more expensive per calorie than hyperprocessed, high calorie/low micronutrient, carcinogenic food. Gym memberships are pretty expensive, even without any of the personal coach and flex location fluff. And for someone with a lower paying job, time is more scarce as well, in addition to the job itself likely being more harmful to health. And of course, health care is expensive, and even if you live somewhere with socialised medicine, access to specialists is a lot easier and more expedient if you can afford to pay extra.
It's not like poor people don't care about their health, they just have fewer options and less time to spend on it. I support anything that can bring more options to more people.
It sounds difficult to make a definitive statement based on the findings of the referenced paper:
"Overall, the vitamin content of the frozen commodities was comparable to and occasionally higher than that of their fresh counterparts. β-Carotene, however, was found to decrease drastically in some commodities."
Yes, citation needed (and also probably unlikely to be forthcoming or validated) but the rest of the comment stands, so let's just ignore this weakest/most-dubious claim.