It is difficult trying to explain this stuff. Every player is different in some way.
I will say this and I believe it.... If a player believes he is a potential 9 or 10 he should attend a showcase. 9s and 10s create the most interest. So even if the player wants to stay very close to home, it always helps when other colleges are making offers. You might end up at the local college, but with a much better offer. You would be surprised what a BIG 10 college might offer when there are a couple of SEC offers to compete with. Or even what any college might offer when they find out you have many options. So if you are a potential 9 or 10, you should gain as much leverage as possible. And most every college wants those 9 or 10 type players. Even if a 7 or 8 it could create interest, but 9s and 10s are legitimate no brainers regarding ability and potential. But the Vanderbilt's, Virginia's, Florida's, UCLA, Texas's, LSU's, Stanford's, Arizona St's, etc., of the world don't have room for them all. However, everyone knows a 10 can possibly make a very big contribution at any program.