oldmanmoses,
You bring up some good points! I would agree with most everything you wrote.
There is one thing you mentioned that I do disagree with, though. Many others have said the same thing in the past regarding the scouting community being enamoured by the gun and high velocity so much that they overlook everything else. It just doesn't work that way! Good scouts don't overlook anything!
If you are a scouting director, and your area scout turns in a report that he got so and so throwing 95-97 in California with decent command... What would you do? What most do is schedule a trip to California to see the kid pitch. They already know how hard he throws, so why would make that trip? Reason... He needs to see the other things.
Of course, high velocity draws more interest than lower velocity. It is near impossible to run around the country writing reports on every kid that throws mid 80s. The lesser velocity kids are usually seen by scouts when they are pitching against a high velocity guy or if his team or the opposing team has known prospects.
It's all about how good someone will be in the future. Getting high school hitters out, doesn't mean the same pitcher will become successful at the higher levels. But we do know what MLB average velocity is. We know that 85-88 is well below MLB average. So when you are trying to "predict or guess" how good someone will be in the future, would you pick the below average current guy or the above average current guy. Also, remember that in most cases the high velocity guy will throw the faster breaking ball as well. Not only that, but those that create the most velocity usually create the most spin, so they have a better chance to develop a plus breaking ball. And regards to speed alone, the 83 mph change up is tougher to hit than the 73 mph change up if everything else is equal. The higher the velocity the harder the same differentials become for hitters to adjust to. EG... Tougher to adjust to 95FB - 83CH or 75FB - 63CH.
Sometimes the mid 80s guy makes it and sometimes the mid 90s guy doesn't make it. It just doesn't happen often enough to change the scouting communities mind. The speed of the game, in every way, separates the higher levels from the lower levels.
Bottom line... The scouting community does care about everything that they see. It's just that they know the vast majority of the best pitchers in baseball, now and throughout history are those that show they can reach a certain velocity.
Everyone would want the 88 mph good pitcher over the 91 bad pitcher. But neither one is going to be a high draft pick. It's not like the scouting community likes every pitcher that throws 90+. They really do look at much more than just the radar gun! Then again, sometimes what the radar gun reads gets them to dreaming about future potential (ceiling)! If an amateur pitcher tops out below MLB ave., I would recommend working to improve velocity. Many have done exactly that!
Please understand, there's a place for the lower velocity guys who can pitch well. I really enjoy watching good pitchers whether they throw hard or not. My remarks above just relate to how MLB scouts most often look at things. Colleges, on the other hand, could easily fall in love with mid to upper 80s guys that can really pitch. I've seen a few low 80s guys with an outstanding breaking ball get recruited by top level colleges. And there is a college for every kid that can really pitch well.