As I've already said on another post:
A: you don't have to kill them for the silk
B: silk moths spend BASICALLY THEIR WHOLE LIVES AS CATERPILLARS and only wrap themselves in silk after they've lived all their life because
C: when they turn into moths, THEY DO NOT HAVE MOUTHS. this is a very common feature for moths. They turn into moths to have sex and then starve to death.
D: in the wild, maybe thirty out of a hundred eggs survive to be caterpillars. Maybe one out of a hundred survives to become a moth. A moth who has a few days, at most, to live. They have no way to defend themselves. Many die before they even get to mate. Some never find mates. If they don't starve to death, they get eaten by a predator. And this isn't even counting the ones who get eaten in the cocoon by parasitic wasps.
E: the lifecycle of a wild silkworm is to struggle, struggle, maybe get sex, then starve to death.
F: domestic silkworms are literally flightless. They cannot survive in the wild. But we take care of them. Nearly one hundred percent of silkworms survive to metamorphosis- and every single one of them lives a safe, warm, long life, where their favourite food is literally handed to them, where they want for nothing. And even THEN, MORE OF THEM SURVIVE TO BECOME MOTHS THAN THEY DO IN THE WILD. The ones who die do so painlessly, and 100% of them gets used- they're literally edible. They get eaten, like they would in the wild, but infitesimally less painfully because they're already dead when they get eaten. Even the cocoons from the moths who chewed through their silk get used! And the moths? The many more who survive than in the wild? They have gigantic orgies, lay eggs that they know will live the same long, idyllic lives they did, and then die.
The life of a domestic silkworm moth is the kindest, most perfect life they could ever live.
This is like if aliens said "hey you get to eat your favourite food forever, live longer than you ever would, and never be in any danger, and your children and their children and their children will also have this, but when you die peacefully in your sleep after living a full life (because you are ssfe from all diseases also) we get your clothes and also your bodies?" and also imagine YOU DON'T HAVE A CONCEPT OF A SOUL OR BURYING A BODY OR CREMATING A BODY OR DOING ANYTHING WITH A BODY. OR THAT THE BODY OF SOMEONE WHO DIED HAS ANY VALUE TO YOU WHATSOEVER. Assume dead humans like. Just lie there and get eaten by dogs.
Literally, to them, all we get out of this is like... instead of something else eating the bodies, we eat them? It's literally just "hey instead of getting eaten by birds, would you like to have lives sweeter than you could imagine but like. You get eaten by monkeys and also less of you get eaten and you're already dead when they eat you."
If you're going to judge someone for liking the byproduct of a process, maybe educate yourself on the process first.
