If you don't want to be homeless, build a house.
Homeless generally means both "not a landowner" and "has no money" which prevents the former even if they wanted to go there.
If you don't want to be hungry, go fishing.
Buy a license, buy a pole, collect bait somehow, weather considerations, legal locations, seasons, specific game fish, prepping, finding wood to cook with...
If you want to survive, get your ass moving instead of wasting the day pseudo-intellectualizing or lamenting about the unfairness of nature that has always existed since the beginning of time when it blew the first human village up with a volcano and the laws of the universe didn't even blink, let alone give a shit.
No, the universe doesn't, for sure. But people who are worth a shit, do give a shit.
WRT "get moving", to quote a fine summary of just one aspect of the problem, "I'm pretty sure McDonald's has an underwear inside the pants policy" (Source here at 3:31 but by all means, check out the whole performance, it's pretty much spot on from beginning to end.)