...but no one says the same about dogs, when dogs are pack animals and crave company, and cats are independent and fairly solitary?
Other than ‘a sibling to play with’, is it actually any better for a cat to live with another cat?
I’ve always either had one cat, or two adult cats who have totally ignored each other. They are not like dogs. Dogs crave social interaction so I can totally see that having two dogs is kind and more how they would live in the wild.
We currently have one cat and I have never once felt that she would have been better off if we had adopted a sibling or another kitten as well. She is really bonded to us, she entertains herself in the house and the garden and occasionally chases off neighbouring cats 
However, when we got her I felt quite judged that we weren’t getting two - MIL even suggested it was cruel only getting one cat.
Whereas I know so many people who have had puppies and no one ever says ‘are you getting two? It’s kinder!’
Is it just the expense? That cats are generally cheaper and not as high maintenance? If so, it’s not really about the cat’s welfare is it?
I totally get that two kittens from the same litter will sleep together as that’s what they’re used to - but it doesn’t mean it’s cruel to have a solitary cat?
Just me??