Also, some the rankings are a product of exposure, attending camps, where they play, system, etc. Rankings matter but, there are tons of great players in every sport that are under the radar.
I coach kids in soccer from 4th - 8th grade and follow them once they get to HS. If you know what you are looking at you can identify late bloomers who are just scratching the surface of their potential in HS. You can also identify kids who have peaked in HS. There are some "stud" players in HS who you can just tell will struggle at the next level because they are no longer making significant improvements. A lot of times these are kids who were able to have their physical gifts carry them.
Still, I would love to see us getting 2 or 3 five star players every year.