what's the purpose of lol? destroy enemy towers until they reach the center (I don't know the name) and destroy it too, passing through enemies and blah blah blah.
now, what is the situation to be studied between lol and cs? lol you have to study the champions, some positions played by the enemies and that's basically it.
while in cs, you have to study the weapons that enemies like to use, the positions they use, what they think in each situation and more. This is a difficult thing to study when, out of nowhere, the player you studied is changed.