Uh, that's exactly what adventurers do. We have adventurers that use technology to punch monsters in the face, and two of them are racial leaders.
Again, you don't see some sub-group of Blacksmiths, herbalists, or cooks who are adventurers "punching monsters in the face" do you?
Also the Tinker isn't a fan-made concept, it is a Blizzard concept. Blizzard has also made it clearly something different than the profession.