Funny thing here is that you're complaining that powergaming makes you extremely powerful.
Not at all. Simply
using Smithing or Enchanting makes you extremely powerful even without fortifying it. If you consider that just by using the Smithing or Enchanting feature is powergaming then you only reinforce my point, thanks.
your post contradicts itself...some people want to be overpowered so the means is put there for them to do so. Others who enjoy more challenge can CHOOSE not to be overpowered and can raise the difficulty level and avoid certain perks.
You don't want an overpowered crossbow? Don't upgrade it and don't spend perk points on archery damage...simple. You can use your weak crossbow and others can enjoy a maxed out overpowered crossbow, everybody wins

Blame beth for not fixing bugs, don't blame them for giving you the CHOICE to be overpowered or underpowered...thats 1 of the things that makes these games great
No it doesn't, read it again and understand it this time.
In Skyrim god mode is reached very easily without even trying. "Hey cool Smithing, lets try that out.. oops I'm now immortal one shot killing everything" My problem is that the choice not become overpowered is also the choice of not using masses of features in Skyrim. You have to actually go out of your way not to hit god mode.
It's sad how many people don't understand the concept of game balance and how it can have a negative impact on gameplay when handled poorly.
If I want to have Skyrim stay challenging I have to avoid using Sneak, Archery, Smithing, Heavy Armor, Enchanting, Alchemy and the masses upon masses of potions found in the world.