I'm not sure why, it definitely isn't broken in SWOH so, why not fix it where it is broken and leave the rest alone.
I don't know football well enough to know if it works well there for seeding, but you have to have some type of fair, equitable way to select teams for the playoffs, in basketball and soccer and baseball that isn't an issue.
Look around D4 as well. Everyone in Ohio had Richmond Heights penciled in as the state champion, the RPI had them #7 in Ohio even though the same RPI had them with the toughest schedule in Ohio. In SWOH it had 4 Cincy teams and 2 Columbus teams ranked in the region above Russia and Fort Loramie. Nobody who follows small school basketball would believe those rankings.
The only way to get an accurate seeding is to incorporate the eye-test
The state wants a uniform way of doing things. Each district is different in the way they run their tournaments.
Some allow teams to "pass" when placing themselves on bracket, some do not. Some make the #1 and #2 seeds go opposite of each other, some districts allow that to happen.
I don't think there will ever be a perfect system but I do respect that the state is looking for ways to make it the same for everyone.
As far as the scouting element goes - I am not really buying that. You can get as much or as little film as you desire now with HUDL. Every game is available and there for you to view.