#and only intervened when sieun was about to start kicking youngbin in the head

[starliteonearth]

I'm not sure how some people think Suho can't stomach excessive violence. He's simply disciplined. His ‘don't cross the line’ doesn't necessarily stem from moral discomfort but most likely from being an MMA fighter where you're trained to not accidentally kill your opponent in a fight. Because some of the moves taught can absolutely do that. You need to be well versed in the techniques you're using so you don't break an opponent's limbs or worse, their neck, during a match. Knowing when to stop is a must. Suho's applying that principle to any fights he's in. He has the knowledge, training and foresight to see when an altercation might become fatal. Sieun and Beomseok however, do not. They crashout with no thought given to the possible grave consequences of their violence (seen clearly with Beomseok in episode 7). Suho therefore tries keep them from going too far.