The point though is based on that Obi Wan knows pretty much nothing about the droid, and the fact that he has no idea of any of the stuff that will happen to him following his grabbing the droid, his decision to jump through the window seems like a very stupid one. We both agree that Obi Wan didn't know what would happen to him in the complex sense: that he would get flown through the city, somehow miss the traffic, somehow miss the lazer bolt, and then freefall into a gentle passenger seat landing in Anakin's ship. Based on what it is reasonable for him to intune--"I will grab the droid, I just have to jump now!"--he clearly did not stop and think about the larger situation he was placing himself in.

You are probably right about Jedi simply trusting their insticts and reacting. But then in the next scene Obi Wan is saying "use the Force, THINK" and then rationalises a strategy using his ability to reason. Obi Wan is normally a very logical person, that's why jumping out a 97th-storey window at the drop of a hat seems a bit weird when you really break it down.