All the best players in the world might not know much about their equipment (but again, there are some who do), but they're not playing any old shaft. They're playing a shaft that is fit very carefully for them. They care very much what shaft they have, but many simply trust their equipment folks to have given them the right thing.
Because at your level of golf it's like thinking that a shaft change is going to help you move the ball from left to right or right to left like Bubba Watson.
Don't fall into the trap of thinking that golf is about golf equipment.
Look at the WITB videos of the top players on Youtube. The majority of them have little or no interest in the shafts they use. They pretty much know they work, don't change them much and in many cases have to look at the shafts to be able to tell with certainty what they are.