Ennis Proctor made this point. Many of the High Schools can't afford to go on the road every week during the playoffs. They let the lower seeds host the quarterfinal and semi-final rounds so they could get more money for their budget.
Not that I agree with it, but that was his logic.
Personally, I preferred playing on the road. When you play at home, you have a bunch of your buddies bugging you and total strangers and front-running fans annoying you. When you're on the road, it's just you, your teammates, and the coaches. Any fans that came were die-hard fans who would stick with you through thick and thin. Nothing better than being able to wave to your parents and chat with them after winning a road game.
One of my most embarrassing moments came just before the Moss Point game: I was looking at the stands, waving at mom and dad, when the coaches started screaming my name- I had forgotten that I was on the kickoff return team and had to get on the field.