FrozenNorth
Hero
We were specifically talking about new players. My experience with new players is that until they are more experienced, they will look for a button to press on their character sheets.If that were true, it would indeed be a problem. Fortunately, it's not. You don't need expertise to contribute, but you can take a feat to get it if you feel it's necessary. In a game with bounded accuracy you don't need ability scores of 20 to be good enough at a skill. You don't need proficiencies at all to contribute to the decision making and role play aspects of the game.
Rogues have a lot of those buttons, due to having more skills than anyone else and having expertise in some of those skills. As well as the fact that unless someone took the Criminal background, they are likely the only character that can pick locks.
Fighters do not. They also suffer from the fact that they tend to be outclassed in knowledge skills by Int classes, Wis skills by Wis classes, and Cha skills by Cha classes.