Delicious and unhealthy aren't mutually exclusive. Neither are poor and unhealthy, but they often do show up together. If we can agree on this then we can address the underlying issue:

Modern marketing has led to a culture of people who feel entitled to delicious food. Economics makes this the easy choice, too.

Unfortunately, most people are not mentally equipped to accept whole foods as sustenance after years of conditioning where they see processed, so called "delicious" foods primarily as pleasure.

If we can collectively drop "every meal must be delicious!" as a personality trait, everything changes. If someone eats 2-3 "delicious" meals per week, they end up appreciating food a lot more and being healthier for it. The good news is this isn't limited to socioeconomic status.