No, I don't think that line of logic is correct. The pure armor benefits from Heavy Armor are higher than light, so it's extremely certain that at that top level you will definitely NOT be getting one shotted, all while reflecting some sick damage back.
Plus, the fact that you can completely remove the weight problems from Heavy Armor itself is ridiculous. The stamina stat is so easy to increase artificially without light armor perks that there is almost no reason not to go heavy armor when you want to play efficiently.
If you really want to role play, go ahead. But you're not getting the best you could possibly get.
Well I suppose everyones personal experiance differs, but I personally have found that the difference between heavy armor and light armor is negligable as it applies to pure armor and stamina is significantly harder to control given my heavy reliance on power attacks. To put it in the form of experiance, in heavy armor I died more often than in light armor. This had mainly to do with with my ability to tear an opponent in half before he even gets a chance to injur me, while in heavy armor I found myself hitting potions almost constantly.
But like I said, I think there is a case to be made for heavy armor, but it really depends on how heavy your reliance on stamina is, their is no amount of artificial bonuses that can counter the sheer amount of mana I go through when I fight. That regen is really important element.