It's called a lunch break for a reason. Lunch is part of it, but its mostly about the break.
(Less snarky response: I actually had a conversation with my beautiful wife earlier today about how frustrating I find eating to be. Helped her better understand why I see cooking as a chore not a hobby or passion. She actually said "You'd actually be happy with Soylent, wouldn't you?")
Different tools for different jobs, I think - it seems a really strange attitude to have, to think that if a company isn't aiming their product at you personally then there can't be a reason for them to exist.
Snark aside, if 0.1% of people would like to replace a meal per day with a flavorless slurry this still leaves them with a 100,000 client base in US alone.