I've never understood the end goal of a UBI. If the expectation is that everyone should be able to eat (seems like a noble goal), why obfuscate that by giving people money rather than access to free food?
If we really wanted a system where we deem certain items essential and went everyone to have access to them, it makes no sense to pay for them. Money may still make sense for nonessential or luxury items, but it just gets in the way if the government has to give me money so I can go spend it on the food they actually want me to have.
I can't speak for every UBI supporter, but singling out food, and talking about “the food they want me to have”, suggests an authoritarian top-down structure that nobody wants. The whole point of UBI is to enable autonomy. People should be free to explore and understand what their own needs are and not have it be dictated.
I'll admit that I was unclear because I used the word “starve” in my message. Obviously this choice of word was borne out of the principle that food is among the most vital basic needs, and that depriving people of it is one prominent way in which our current society is cruel. Nevertheless, UBI is not about just food, but more generally about basic needs.