Pick-resistant locks have two known problems. First, if they have to fit inside a traditional lock cylinder space, the options are very limited. If you're willing to have a bigger lock body, pick resistance isn't as hard.

The second is more subtle. Pin-tumbler locks, as they wear, become easier to open. The pins wear and become rounded. Pick resistance decreases, but you don't get locked out. Some high-security designs fail in the direction of staying locked, even with a valid key. So either you have angry customers locked out, or everything has to be made in stainless steel with high precision at high cost. (That's Abloy.)