My observation is that most pilots do not fully check and interpret all the forecasts which include F215, F214, TAFs etc.
The Rainfall Radar picture is also very useful.
This is because they are often not taught how to do this.
Obviously one should also look upwind before departure (especially in shower situations).
However just because it looks ok at the moment doesn't mean you should go flying - if the forecast shows a worsening trend it's common sense to take that into account.