I posted the below, then edited it out because I realised it was a bit off topic and I should ask in OT.
But I was too late and a bunch of people had already quoted me so I'll just add it back in:
I'm surprised so many people are against letting cats go outside in here. I'm not saying they're wrong, I've genuinely not heard of it being an issue before. I know there are risks but is it generally not recommended to do at all these days? It's normal where I live and my vet acts like it's very normal too.
We have two adopted cats that live with us, one is extremely nervous and doesn't like going outside because we adopted her from an abusive previous owner. She obviously lives inside 24/7 and is fine.
But we also have a younger cat who is extremely energetic and playful. He screams to be let out every morning and goes to hang out with the local cats. He stays inside for most of the afternoon and isn't allowed out at evening or night. But he goes out to explore every morning for an hour or two and to deny him this would feel borderline abusive and would result in extreme zoomies and him harassing the other cat.
I live in the UK where him coming across something like a python is impossible but I'm still open to learning if this is something I should be stopping...