Unless you live in the native original range for cats, and your local region has zero automobiles, and you have no issue paying vet bills for random illness or parasite infections, then sure. Its probably not that big a risk to let your cat out unsupervised.
Brits are very arrogantly incorrect about their cat care. They are driving local wildcats extinct, and feeding their pets to local foxes, badgers, and car wheels.
You can still supplement outdoor time for your cat tho. Harness/leash training isnt too difficult, just go in areas you dont expect dog walkers. And you can also build catios, outdoor spaces that are fenced in.