I don't understand why you think deploying gas would require less skill/effort under pressure than a handgun. I have received training for the carry of both handguns and gas. For every variable that you can point to that makes upthe act of deploying a handgun, there is a similar component with bringing bear spray to bear (pun intended). With both, you must:
[ul][*]Decideto draw the device.[*]Competently clear the holster.[*]Accurately aim the device.[*]Decideto fire.[*]Competently trigger the device.[*]Follow up[/ul]
I would suspect most people train significantly more on the above elements with a handgun than with a can of pepper spray.

Granted, bear spray has a broad pattern,making aiming the unit a little easier, but is only effectivesprayed into the face.Anywhere else will be completely ineffective.

A pistol round can be effective in either a head or torso shot. It also has the side benefit of a bright flash and loud report that may dissuade an attack.

My point is not to look to bear spray as a talisman that can be clipped on your belt and taken for granted. Whichever you choose, make sure you are competent with it.

-- FLIX