I've GMed 1000s of hours of Rolemaster. I understand the "simulationist" aesthetic in RPG design and adjudication.One thing I've noticed is that the people who aren't bothered by it generally can't even grasp what is being talked about.
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I think understanding it makes it objectionable. Those who don't find it objectionable generally don't understand it.
My point is simply that there is no particular correlation between that aesthetic, and actual immersive experience in play.