Part of the equation is having an animal big enough that it has a certain score even with deductions.

For example whitetail bucks that gross 170" are much much more common than the ones that net 170"

If you left the minimum the same and started using gross score the whole thing would be watered down.

Just adding a gross category might be good but like I said the requirements to get in the gross category would have to be much higher to hold significance.

Animals that just missed typical because of deductions still wouldn't/shouldn't get in.