In RTWP: oh that guy is peeking out at the end of the corridor, I can shoot at him when he does so
Why is anyone acknowledging this as being an even vaguely positive point for RTwP? In real life, if someone is advancing on you down a hallway while you are behind the corner and you both have ranged weapons; you have a massive fucking advantage against them.
You barely need to expose yourself to shoot at them and you have a reflex advantage when you do. It's called "peekers advantage", "cutting the pie", or just plain "being in fucking cover when that idiot isn't". If you, the guy whining about "muh reflex games" actually played a tactical shooter once in your life you would know that.
In RTwP, the person who should have advantage would step out, and like he says, the game would pause and both units would have the same time and chance to hit each other with the corner not being factored in at all; which is completely idiotic and unrealistic.
Therefore, in the strawman TBS system the outcome is far more realistic even if it doesn't look so. The unit peeking has significant advantage. In a proper system with overwatch or interrupts, they intentionally put a lowered chance to hit on overwatch shots and a significant amount of reflex skill is required to even make them, matching real life even more.