Nothing in either set of rules prevents the receiving team from getting a 10 yard head of steam either. Just start on your own 40 yard line and run forward at the kick.
Yes, NFHS are usually more safety conscious. But I'm not sure the prohibition on blocking in the NCAA is a safety issue. I think the rule is more for competitive balance. Under NFHS rules, we teach the kicker to put the ball in a certain spot, and teach the blockers to block ahead of the ball and to block R players away from the ball, and the kicker is responsible for falling on the ball. The blocks aren't particularly violent, but if done right, they are effective.