Convenience is king.

I get where you are coming from. I try to buy unprocessed as much as possible, but there are days where I want something that I could do myself or buy premade from the grocery store. On days like that, I'm glad I have the option to buy premade even if my self-made version tastes better, is healthier, and often cheaper.

Besides that, its a good tool to get the general omnivore to reduce meat consumption. A friend of mine does eat meat but is lowering her consumption of it. Having a convenient alternative that she doesn't have to think about and can just get prepackaged helped her half her meat consumption in a effectively a few weeks.