Chaosmancer
Legend
Why is it unfair?
I feel that when the argument is made about how much social/utility abilities someone has, the points that everyone gets basic competency and those without extra has no competency gets mangled around.
This game is a team game up until combat ends, at which point it somehow becomes a single player game with multiple people.
A bard, by himself, against a CR-appropriate enemy (CR1 vs level 4 bard) is mostly screwed. They have good abilities in combat but they can't confirm a one-round kill easily and they can get wrecked when a monster gets within melee. They can maybe survive, but it's a toss-up and not a good situation.
A fighter against a CR-appropriate enemy can survive and probably kill it with minimal HP loss. They have higher damage actions and their defenses are naturally good enough to take quite a few blows. They're definitely in better shape than a bard. Have you never wondered why a bard only gets basic combat competency while a fighter could survive one-on-one fights without much concern? Probably not, because it's about being a team. In a team, the bard can do wonderful things. Not just buffs, they can use any concentration spell without as much threat of concentration loss.
A bard is more competent with teammates. The party is stronger than the sum of their parts.
The same goes for social and exploration. Some are more competent at something separately but they all become greater together. When the dwarf doesn't care how charming the paladin is because he bears the symbol of a diety who the dwarf hates (which is really everyone), the fighter steps in and says "Fine, then it shall be a test of who can drink the most ale!" Then the cleric casts Protection from poison to help, but you're the one who has to drink. The battle of the centuries, a likely success because your friends helped. Just like in combat.
When the ancient ruins' entrance is booby-trapped, the fighter's natural hardiness comes in handy. A wizard may have not even stood a chance against it, taking more than half their health while taking only a quarter of yours.
The Bard has plenty of ways to deal with a single CR 1 enemy. Especially at level 4.
The fighter has no way to assist outside of combat without GM fiat. I mean, really your example is the fighter declaring he'll have a drinking contest? How about this, the dwarf who wants nothing to do with the party because they despise the Paladin and the Cleric says "No! Get out of my face." Now what does the fighter do? Insist?
Also, way to get immediately disqualifed and spat upon by casting magic on the fighter right before the context begins. That just ruined any chance of that plan working (and it was a pretty crap plan to begin with). I mean, you seem to be assuming that the Fighter can just declare a contest and the other person is just going to agree.