There is NO valid comparison to being able to "pitch inside" when we are talking High School Baseball and Professional Baseball. HS Pitchers velocities have increased to amazing levels over the course of my career but their experience level remains the same. I was pleased to see the above comment regarding the fact that the majority of most HS pitchers do not have the control necessary to pitch inside PRO Style.
HS baseball is not Professional baseball. HS baseball has its own rule set making it a different game. Much of NFHS rules are implemented for player safety, reducing taunting and intimidation and making HS baseball open for more players to compete.
You often hear these sort of laments such as the OP here from Parents of Pitchers but rarely do you hear the same agreed to by the batters parents of players that are injured. Its tough talk to hear from them knowing that most HS pitchers get DH'd for and never get in the box themselves....
I'm in charge of the safety of the participants of the game. I'm trained and experienced. I know the difference between pitching to the inside of the plate and throwing at a batter. I will keep player at the plate who goes over the line to draw a HBP and I will warn a pitcher for any deliberate action in hitting a player. I will eject, without regret, any pitcher who ignores this warning.
I understand that balls get away......and that's why its important that we (umpires) do not get swayed by the "old school" "sissy" "cry babies" comments. Use the rules we have, In the spirit of the rule set being applied.