As much as I hate to say it (because I love really hard games and like how they have nerfed/removed OP perks) I have to agree with you. It is a single player game, so balance shouldn't be "as much" of a concern. They should still try to balance the game in most areas, but having one or two perks that are crazy powerful should not be an issue because it is up to the users to take them.
I don't know I agree with this.
Challenge is part of the fun in a game, if a game is not challenging then you blow through it to see the world, get bored and put it back on the shelf. I can't tell you how many games I've done that with. Great for a playthrough, but they didn't have staying power.
I'm on my fourth playthrough of New Vegas, because of the increased difficulty more different builds are viable, so it actually makes a difference if I do a legion/melee playthrough or a wild card energy weapon build run.
When there is one superpowered build, it means the game just has no challenge, if you happen to find that build first, well there it is.
Now I know you can just not take it, but if you're at that point in your boredom with the game you're intentionally misbuilding your character to try to make the game as challenging, you're one step in game boredom away from just drawing dirty shapes on walls with a sniper rifle using the bullet impact decals.