This is a bit of a case of the pot calling the kettle black. We've only seen Energybending happen once and that was the Avatar doing it to the most powerful firebender in the world who was under the influence of Sozin's Comet. For all we know, Energybending might look different every time, or at least when it's not done by the Avatar or on a Sozin's-Comet-influenced firebender.
That's like saying we need to start moving away from relying on electronic technology. Bending has long been the most valued skill in the avatarverse and has been a reliable method of powering technology. There never really seemed to be a reason to them to start moving away from reliance on bending. If a non-bender had trouble he couldn't deal with himself, he could just call upon the help of a bender to do it for him. Like how you call a plumber if your plumbing is broken and you don't know how to fix it yourself.