artificial insemination isn’t torture.

Doing so to a creature who can't consent is pretty wack though.

cows aren't kept constantly pregnant

Female mammals, including cows, produce milk as a result of pregnancy in order to feed their young. The dairy industry is for-profit, they're not going to let their dairy cows have downtime from producing milk if there's money to be made.

kicking and beating cows isn’t part of husbandry.

The meat and dairy industries have lobbied hard for ag-gag laws criminalizing photography on their farms after abuses have been discovered by undercover investigators and activists. It is undoubtedly a part of animal agriculture. Here's a whole paper about it, if it interests you.

killing cows at the end of their useful life is fine.

It definitely isn't the worse part of the miserable lives we make them live after breeding them in massive numbers. It's probably a relief at that point.

Also, just a sidenote here, I scrolled a bit through your history and you seem to go on the defensive for meat and dairy whenever you come across anything relating to veganism or the negative impacts of those industries. You engage with vegan content much more than I do and I'm vegan! I don't think I can change your mind about veganism, nor do I really feel the desire to write any more than I already have. But, I don't know, maybe go comment on stuff you enjoy rather than getting riled up about this stuff? It might make for a more enjoyable experience on lemmy.