At the $10 price point? Z-wave stuff always seems to cost more, and my understanding is that is largely due to the requirements for compatibility and testing per Z-wave alliance. I'd be shocked if this same thing could even be made at reasonable margins for $10.

The flip side to this, is Zigbee stuff always has a lot of little quirks, problems, or bugs. There's literally an entire module/database for ZHA (Zigbee Home Assistant addon) called ZHA Quirks that's designed to work around all the little issues with various devices.