Vegan =/= health, salted fries, palm oil and ketchup is all vegan and I doubt you think of it as healthy.

But anyways, only reason healthy food would be cheaper than non healthy one is if there’s taxes on the non healthy stuff. Non healthy stuff is sold because it’s cheaper or tastier. If they can add the healthy label to sell more they will.

Have a friend that did a masters in psychology which paper was about Biological food. Anything you see with that label gets a price hike. Rarely the on the actual products tested there were feasible differences because biological isn’t a well defined concept.

Father of a friend plants biological tomatoes for himself. For his peers, you just need to not add chemicals and treat that plant biologically. He however only accepted produce as biological if the seeds came from a platelet treated as such, so his biological stuff is second generation onwards.

Since the concept isn’t clearly defined, it’s bs and companies use whatever they can to make a buck.