I can just about understand that some people don't have any decent food options at the workplace. They work somewhere small, and there are no local food providers, and any food available is terrible junk.

You have the options of remember to buy nice food that you can take into work, or taking a liquid food. The liquid food might not be tasty, but ensures you're not eating trash and are getting some nutrients.

And, from there, I get that there's a link between Soylent and YC, and so people are really keen to see them do well.

But I can't understand why people seem to ignore the very many brands of liquid feed already being made, which have undergone serious testing.