For instance, read the first sentence from Harlow's Wikipedia page:
> Harry Frederick Harlow (October 31, 1905 – December 6, 1981) was an American psychologist best known for his maternal-separation, dependency needs, and social isolation experiments on rhesus monkeys, which manifested the importance of caregiving and companionship to social and cognitive development.
Did we really need to torture these creatures for decades to understand the importance of care giving? The experiments seem like a flimsy pretext for torture.
>In 1971, Harlow's wife died of cancer and he began to suffer from depression. He was treated and returned to work but, as Lauren Slater writes, his colleagues noticed a difference in his demeanor.[6] He abandoned his research into maternal attachment and developed an interest in isolation and depression.
From the wikipedia page.
Going back to poor Laika for a moment, you could adapt an old, morbid joke: "we're going to murder all the kulaks and one dog." "Why the dog?" "Why the kulaks?"
Having spent a decent chunk of my childhood in a rural area (and seen many pigs being killed by various methods, none of them very humane), I also don't care about this stuff too much tbh.
Judaism actually has a law called "Tza'ar ba'alei chayim" which prohibits unnecessary suffering to animals, and mandates a procedure for painless slaughter. This was unprecedented for its time - back then no one cared at all.
Yes, we did. Look at: https://en.wikipedia.org/wiki/Hospitalism people didn't even understand how much humans need care, never mind animals. The people placing these babies into care did so with the best intentions, but insufficient knowledge.
Your knowledge comes from these experiments.
We figured this out without needing to torture monkeys. Apparently, though, this was not sufficient for Harlow, as he created his pit of despair almost 30 years later.