Tell that to the Valakians...
That was a horrible episode, and I can't understand the praise it received except maybe critics are nihilistic weirdos who yearn for death to release them from their sad, gay lives.
So the Enterprise finds a planet where people are dying of some kind of genetic disease, and decide "let evolution take its course, lol" and fly off, leaving them to watch their families die as they go extinct.
Till next week's exciting genocidal adventures, friends!
I GOT FAAAAIIITTHHH OF THE HEEEEAAARRTTT
Apparently this is "morally complex" and some other bullshit. Except it isn't, at all. We're told 12 million of them died in one year before the Enterprise arrived. They're an intelligent, sentient, civilized species that's capable of spaceflight, no doubt with a rich and unique cultural yadda yadda. And they're begging for help, which the Enterprise could easily supply.
The script tries to justify it by accusing the Valakians of a mild form of space racism, and has Phlox claiming they're an "evolutionary dead end". But I don't think that's even a scientific hypothesis. Evolution isn't a predetermined tech tree in a PC game, the only dead end they're facing is that they have an easily curable genetic disease that Phlox refuses to give them. Phlox thinks the less advanced species on the planet will flourish if the other guys all die. Well, how does he know? They could end up killing each other, or turn into space nazis, or any number of things.
It's like if they had a show where some African village is dying of drought and the "heroes" decide not to give them any water because "evolution, lol".
The same people who praised this sociopathic shitshow probably lose their minds at pandas going extinct because they don't feel like fucking, and thought Picard's decision
not to permanently get rid of the Borg (who were a kind of anti-civilization responsible for the death or mutilation and enslavement of billions) was some kind of heroic moral flex.