Getting people to eat better is not an easy problem to fix.
(BTW, it's also easy to paint restaurant food as bad, without actually examining why. It's also easy to make unhealthy home-cooked organic food.)
You can't say it's cheap because it's not being sold to consumers. There's a promotional price that works out to $10 a day which is cheap but not out of line with similar products.
"reasonable, healthy nutrition" give the benefit of the doubt here.
"no planning" - doubtful, it's a powder mix you make into shakes. That requires some planning.
"no decision making" - identical to any "eat only x" diet, many people would not consider this a selling point.
"easy" Ok, we'll give them a pass here. Not the easiest though.
I assumed it was going to be way cheaper than that.
"Soylent fans" who are fans before the actual product has been seen or tested in any significant way might self-identify as people who need to be targeted by the first paragraph of this reply, however.