Oh the shock and horror, the animal that hasn’t been fully domesticated yet likes to be outside. Just because you let your cat go outside doesn’t mean you’re neglecting it.

There are 5 basic welfare needs: suitable environment, suitable diet, need to be housed with or without other animals (species specific), need to be protected from suffering/disease and the need to show natural behaviours. Sure most of them can be met indoors but you can’t provide a suitable environment or let them show natural behaviours unless you allow them to go outside when they need to or you live in a mansion that’s big enough for a cat to fill it’s territorial range.