Cats, like raptors, are carnivores and wreak havoc on bird populations.
The experts in this article don’t share your view as far as the UK is concerned:
amp.theguardian.com/environment/2022/aug/14/cats-kill-birds-wildlife-keep-indoors
They agree cats kill millions of birds; but birds have many young and cats tend to kill the weaker ones, who are already “doomed”. The organisations like the RSPB see the major threats to bird populations in the UK as global warming, intensive agriculture and new buildings!
We have 2 cats - one, who goes outside whenever he wants, hasn’t a clue how to catch birds. We’ve watched his attempts - he’s black and white, running across a green lawn and taking a flying leap at a bird! It sees him coming and is flying out of his reach, before he’s launched himself at them! Absolutely useless!
His sister doesn’t believe in the big outdoors, probably having had enough of it as a feral kitten - she’s been outside once in the last 6 months!
So, it’s unfair to generalise about what the whole cat population are doing, when some of us with cats, know they are about as much use at catching birds as a chocolate teapot is!
Anyway they are crepuscular hunters - it’s easy enough and safer for them, to keep them in at night!