> On the other hand, as in technical hiring, it is probably better to miss 10 good tenants rather than rent to one bad one. Right?

Sure, if there is a shortage of housing and surplus of potential tenants. But in areas where there is a surplus of housing, it might be better than fill a unit with a tenant who has a 15% chance of not being able to pay rent (but who is otherwise a good tenant) than leaving the unit vacant for a year.