That's... pretty silly mate. Just ask my five themed roleplay characters who all have distinct different playstyles and quests completed in their own unique ways.
Being like real life means absolutely nothing. It means so little of nothing that simply bringing it up drives me to make this post. I don't care about realism. I don't care if you have to restrict your choices and have to get specific skills to do well. I want the freedom to make a character that smashes things with a mace and throws lighting with the other hand before putting on an artifact armor despite being the wrong type for my skill. To just wear clothes as a fighter character and have it be viable.
I want to roleplay without the clunky mechanics holding me back.
The exact opposite, Morrowind doesn't hold you back to do that, it only means that you have basic limits like you can win the game in 1 second, and can't blow up the continent. You could be a necromancer with a horde of undead, wearing plate mail, and use crossbow. However if you want be like that you have to pay the price, unusual character are harder to master.
On the contrary in Skyrim you couldn't really be anything but a shouting, dragon killing barbarian, what gets old fast. I can even finish the Morrowind main story 3 different ways, let alone the thousands of faction quests. Or is it hard to shallow, that you have mission what make you unable to do a mission of an enemy faction?
In Morrowind you have your choices. In Skyrim you have your directions.
ps.: he was the one who pressed the real life stuff by saying, in real life you wear light armor under heavy, then why do we have multiple armor types in the game, and why don't a heavy instanly knows light armor too.
pss.: play Calvinball if you like really unrestricted games