My impression is that these companies are not even branding their products as health foods, exactly. They’re succeeding because so many consumers now expressly care about the environment and want to reduce their carbon footprint along with their consumption of factory-farmed animal products.
I think you're correct. The younger generations are especially feeling pressure to try to take action to reverse climate change and become carbon neutral!
I hope to see more people change their lifestyles to become carbon neutral! At the very least, I hope people will vote with their money and subscribe to something like https://projectwren.com/!