I'm worked as a wrench in a handful of LBS's and they use whatever works the best.

Stupid stuff like the ParkTool STL-2 ot STL1.2 is mostly to impress the customers.

Some ParkTools are okay. Most of them are not. Overall ParkTools is far from the best.

ParkTools are made to be affordable by DIY end users. You can tell by its price, all ParkTool stuff is way less than shop automotive tools.

Thinking that ALL tools must be and only be ParkTools, well that individual is a "tool" themselves.