Let's talk about our Red Rush strategy...

The main problem with a red rush is that for every 1 real red rush, there are 10 "red rushes" where a hero with growth stumbles upon an opponent's scout hero or an empty castle. It is precisely for this reason that the idea of allowing red rush is being pushed forward, and not at all out of a desire to help the red player. That is, to make the flow of the game more natural and less burdened by rules.

What in that case prevents changing the wording, so that the red rush is only prohibited if the attack is on an opponent's town/garrison/hero that contains more than 30% of their forces, for example. Thus, you can hit scout heroes and towns with leftover forces, but not the main army. After all, it's visually clear even whom you are hitting: a scout hero, a reinforcement caravan, or the main army.