While I agree with you, I think you may have missed his point. Enjoying eating is different than satiating hunger/nutrition.

People enjoy eating food that tastes good. Fast junk food tastes good to a lot of people (including me, even knowing the health risks).

The only thing that has a chance of replacing this is food that still tastes good, or that you can convince them is good for them (Subway has been pretty successful with this tact).

I'm definitely skeptical that something mildly sweet tasting (like watery cake batter) is going to get the masses on board with it.