>>96242404
When it comes to Light Armor only prof, I'd argue that the good aspects of having it is the following:
>You don't have to prepare Mage Armor and you don't have to use expend the spell Slot to cast it once or twice a day
>You have access to Magical Light Armor- this could be Enspelled Armor, +1/2/3 Light Armor, Armor of Resistance, or Homebrew/Third Party Armor.
It cannot be understated how useful it is to have access to magic armor- even if its total AC gain is less than Mage Armor those other bonuses can easily make up for it. Plus armor is cool...