If squirrels eat from a bird feeder, it will not attract many birds  However, squirrels eat from a bird feeder only if it lacks a protective cover
So a bird feeder will not attract many birds if it does not have a protective cover
Tires wear out prematurely if car owners neglect to check the tire pressure regularly. Unless car owners are unaware of this fact, they check the tire pressure regularly. So car owners need to be made aware of the consequences of neglecting to check the tire pressure.