I don’t let my cats roam because of traffic and feral cats here. But people with farms and barns find outdoor cats very useful to keep vermin DOWN.
And in the neighborhoods where I’ve lived, crows killed more songbirds than cats ever did.
(Humans contract toxoplasmosis from indoor cats far more easily and often than from outdoor ones.)
I have a bunny problem.
They eat several hours a day, including my caladiums.