Here are my thoughts; it's elementary and by no means scientifically based but why not start discussion...
With HH, the body is sending continuous, pronounced signals to sweat from the armpits, hands, feet, crotch, torso... So, when you block a location from sweating, for example with armpit antiperspirant, the body is still sending a continuous signal but can no longer sweat from the armpit. In order to maintain this continuity, the sweat intensifies in other locations; say your hands.
I think the analogy of a shower head applies here. If you turn the handle to a specific setting, let's say full blast, there is a specific flow rate output from the shower head. If you adjust the shower head to make the holes smaller but keep the full blast setting, the water comes out faster. BUT the same amount of water is coming out to maintain continuity.
I also think if you keep the same setting and plug a few holes of the shower head (armpit antiperspirant), then the water flowing through the other holes (your hands) will flow faster but the same amount of water is coming out to maintain continuity.
-- Isn't this what ETS does in regards to compensatory sweating? You cutoff the wiring to sweat from a specific location, but the body is still sending the same continuous, pronounced signal; it just can't make it through a cut/clamped line. To maintain continuity, existing lines (other sweat locations) pick up these signals and thus you get more sweating in locations that did not sweat as intensely prior to surgery. I think ETS is great in pinpointing signal routes of sweating, but to turn off the actual signal -- who knows. Maybe that is the next research frontier for dermatologists. I don't know.
But this is just a silly example. Throw in stress (being interviewed) and weather (interview outside in 100 degree weather) and the complexity goes crazy. I am curious to hear what others think.