These days, “poverty/homelessness” per sé doesn't kill people.

Most die of old age; others die young from a form of mental illness
that makes them inject too much heroin, alcohol and pills ( mixed ).

Epileptic seizures ( and the requisite pills ) shorten lives.
Gambling can get you killed before your time.

Driving/Boating drunk/high gets the job done, as eveyone knows.

A close friend of mine ACCIDENTALLY died from hanging too long
off his door·knob ( while super high/drunk, no doubt ).

Amazingly, kids these days ( “gaspers” ) do that for the high;
it makes them “nut” ( cum ). Again, there's a mental problem here.

It's called “Breath Control Play” ( “Erotic Asphyxiation”, Waterboarding ).

Bottom line:
Mental poverty will kill you, financial poverty won't.