I can't say I've ever experienced this issue with the air blades. They seem easy to use them without touching any part of the hand dryer. I'm surprised that people have trouble with this!
I use these all the time (they’re pretty much everywhere in the U.K.) and haven’t experienced this unbalanced pressure issue. They always seem pretty much equal pressure on each side to me.
https://www.youtube.com/watch?v=ExuvJkZ61Cg
With large hands, there's an extra degree of difficulty to avoid touching the sides and the bottom. It still leaves you with wet wrists and damp fingers.