The thing with the threadless-collared sub-minis is that every time you flip it, push on it, tap it — the brunt of that movement is born upon the solder-joins if there's any sort of gap between collar and enclosure (there usually is, to ease mass assembly) and eventually movement of the part on the PCB goes from a bit of short-straight blonde to long-curly black movement and then the solder-joins around the pins cracks and you have an intermittently faulty switch that will fail altogether, if ignored.
I bet that's why you see the glue on the S'more Dunkin' example, to help minimise the movement of the switch on the PCB and to delay the inevitable eventual failure of those solder joins.
A threaded, nut-locked switch tightened down to an enclosure cannot transfer the physical momentum of repeated switch-flip-abuse to the PCB/Solder-joins; instead that energy is absorbed by the switch-internals and the enclosure.
At least, that's my layman's theory of the physics of it all...
I first came across the ... aforementioned graphic terminology... while working in the transportation-side of the movie industry — lots of colourful language from those mother-truckers.