TwoSix
"Diegetics", by L. Ron Gygax
I mean, that's really kind of the main question, isn't it? 5e builds core competency in some facet of combat into every class. The question then is, is it OK to violate that precept in order to have a character focused on exploration and interaction?with more/better skills/tools you can help your party before combat with scouting/negotiating and simple knowledge checks to find out what to hit the enemy with and what not to use.
I don't see why not, but "every character should have to pull a certain amount of weight" is an opinion I've seen expressed by many posters over the years.