I'm not talking about a clicky, that's the SW-02. The SW-01 is a twisty with momentary. My point is that momentary and constant on can both be accessed through twisting thanks to the raised fins on the tail cap. Holding the light in a reverse grip the tail cap is easily switched on and off with a modest movement of the thumb. I mostly use momentary too, I have just found the button isn't necessary with the better designed SW-01 tail cap. It makes sense to me, the SW-01's were designed to be easy to activate.
The recessed tail-cap is a big no no for proper low light shooting. Using the Rogers/SureFire technique it's useless. Using anything else (ie. Harries, Modified FBI, Kneck-Index, etc.) it has a place.
However, you are "that guy" that feels it's more natural to yourself when paired with a gun. Most others, myself included, would need a forward-clickie or twistie where the tailcap was not recessed and while being pushed, activated momentary on.
As far as everything else you would need a flashlight for, then that is still personal preference.
I can see what you are saying, but like everything else, can only be used in certain situations. As far as general use, I can see what you are saying. Just slightly twist with your thumb and forget. It's less physical work than clicking and un-clicking and as easy as momentary, but you don't have to continously hold it.