Too many birds are a health hazard just as too many filthy rats or mice. The cats do the job God put them here for.
“Cats kill birds and small animals. Lead poisoning kills some birds and animals.”.......
In particular the lead (.22 cal size) kills cats that come anywhere near my yard. I live in a very rural area and cats are often dropped off or wander into our area in search of “food”, they don’t last long.