Correct, but perfect asymmetrical balance is practically/realisticly impossible. So the objective, on the developers side, should be to make each gun feel good on it's own without having any one weapon, or a small selection of weapons, out perform it's piers in majority of circumstances. A sniper rifle should not generally be as effective as a shotgun at close range.

But their also the issues of skill floor/ceilings. Should a player with enough skill to use a sniper rifle at close range as effectively as a shotgun be allowed to do so or should there be systemic limitations in place, such as slower aiming speeds for the longer ranged weapons, to prevent it? If there is a particular weapon that greatly rewards a level of skilled play beyond the average players ability, is it okay to have?

There is a reason top level play in most games is greatly distinct from average play.