> as good as a fast-food hamburger

But at a much higher price? The value is not really there IMO.

From their performance it seems like the intersection of (cares about animals | methane emissions) & doesn't mind health effects & less price sensitive & must eat hamburger-likes is too small.

Interesting point on cognitive dissonance though. I think it's possible to draw a rational tradeoff between acceptable amount of (externalised) cruelty and personal benefits of eating meat - no cognitive dissonance needed.