Here's my challenge: name any other class that, when faced with certain monster compositions (minions, melee skirmishers/soldiers, even some brutes/lurkers) can enter a combat with absolutely no fear, unless severely outnumbered or outpowered.
You might be missing the point here.
4e is built arround the assumption that typical monster groups will fill many (but not necessarily all) of the roles. If most encounters are with only one or two monster types, you are not only short-changing yourself, but you are probably making the combat less exciting than it could be.
4e is also built around the assumption that many combats will start with the PCs being outnumbered, and the terrain being a significant component of combat. These factors too can mean danger to any PC, regardless of class or build, and that no one PC can control the entire combat.
Finally, 4e is built around the assumption that the PCs have roles too, and that the monsters know those roles as well as the players do. The fighter is the defender. Defenders
...<wait fer it!>...defend. They don't do tons of damage. The monsters can see this (
plain as day), and will do what they can. Perhaps they'll back off and pelt the defender with ranged attacks. Perhaps they'll try to ignore him and go after the squisher targets. Perhaps they'll just charge and hope for the best.
Bottom Line: If it ain't fun, don't use it...YMMV, and all o' that... but keep in mind how 4e builds its challenges. It's not cut-and-dry.