...is as good as Legendary? Because to be fair to enemies on Adept.

For example, if you are Warrior, you use Smithing. If you are Thief, you use Alchemy, If you are Mage, you use Enchanting.

So if I'm a warrior, I cannot use any potions or enchanting items. "But I can use dragon power as the Dragonborn."

I want to play like this because I don't like my character to be weak.

Also, I can use food because it's the exception.

None of my warriors are "pure" simply because i use healing spells instead of potions.

The general rule is don't use potions during fight, only before the fight (Potion/Draugh/Philter/Elixir of the Warrior/Berserker/Defender, Skirmisher/Knight, Healer, Regeneration/Vigor/Lasting Potency, Health/Extra Magicka/Enhanced Stamina, Resist Fire/Cold/Shock/Magic) - depending on my build and the enemy i'm facing.

Even if i don;t use enchanting and alchemy, i can find what i need at traders or while exploring.

Also i use best Fortify Smithing gear i find and Blacksmith's Potion/Draugh/Philter/Elixir when i improve my items.

You can play this way even on legendary difficulty.

Adept makes your character overpowered.

I use The Lord Stone or Atronach Stone.