The stab-loc on a switch or receptacle is UL approved as a method to terminate #14 conductors.
If the plate has a plate for the placement of the conductor then stripping the conductor and sticking it straight in is the method approved for this device.
Somewhere someone came up with the idea that wrapping the conductor around the screw in some way makes for a better installation but it is nothing more than a wives tale.
UL test each device with the conductors terminated in their listed manner at the rated ampacity for a period of three hours. This is done several times for a predetermined amount of time before it passes the UL test.
If I had penny for every time someone posts on a discussion forum that the approved method is not to par then I would have my very own airline, but, alas, after being in business for half a century I have yet to find so many failed installations. This must be something special to their area. If it is special to “their” area wonder what this is saying about electricians that must have been the ones that taught them.