But that filter is at best inaccurate then isnt it? Surely there exists a driver which would accept a tipless delivery, but you cannot find them because all you can do is decline to do business.

Americans need to remove the idea of tipping. It's archaic, because it was originally there for an aristocratic/wealthy patron to show off their status to the lowly servants of an establishment.

Just charge a price, and have it include the full service fee required for providing the service.