This is very egalitarian of you, but much like the effort to turn STEM into STEAM you would strip the world of a useful distinction in order to be more inclusive.

When I say someone is technical I mean this: I could give them instructions that include the words "open a terminal/command prompt" and they would both know what I mean and not be completely freaked out at the idea. If they are non-technical, then they may use several different devices quite successfully but have only the faintest idea how they work under the hood.

Every industry has to make this distinction: an auto mechanic needs to know whether they're talking to someone who understands cars or someone who just drives them. A plumber needs to know whether they are talking to someone who understands plumbing or just knows how to flush a toilet. They may have different words to describe this distinction, but it's an important distinction for the language to have and the word we've settled on in IT is "technical".