Because you've got to choose your battles in life. I absolutely support efforts to alleviate hunger, and who says one person can't contribute to both causes?
Ok, ill give the guy who lives under my stairs some vegan burgers, i hope he likes it........
You think all our efforts are altruistic, just to create a better world? We like to think so, too. Our brain invents this lie for us, to prevent us from discovering our true motivations, which are not quite as noble. I am very sorry to disappoint you, but we are only human.
Because through writing free software, you are changing the social & economic structure of the world, and in the end, those people will be hungry no more.
How can you watch films if we still have no cure for cancer?