CS is such an awesome game in my opinion, because it is not so much about reflexes but brains, knowledge & patience.
Partially true.
There are plenty of CAL-O teams who can go 6-2 or 7-1 on nothing but their reflexes and shooting ability. Thus, reflexes and aim are a HUGE part of CSS. Although, if and when those teams get upped to IM or M they usually flop until they learn some good strategy. On the other side, you have teams who are really good strategists, but not the best shots in the world. They usually do ok in CAL-O, but have a harder time beating teams. This is primarily because it is much easier to out-shoot an opponent than to out-think them.
Yes, it is a very good thing to put yourself in to a position where you won't need to out-shoot an opponent via knowledge, brain,s patience, and strategy, but at the same time, it is also very necessary to have great reflexes; both strategy and reflexes are essential to CSS. In regards to which is more important, that is up to you.