Well, that's exactly what I'm saying: if scouting doesn't count as an attempt, a player might scout the map multiple times using cheat codes, exploring different options, so that the final, perfect run would be just one. Why did you suddenly focus on the numbers – "no more than 2-3 clean runs"? Why not 1 or 4, for example? Or do you have some data based on real-life examples? Can you provide them? ;)
P.S. Proper scouting doesn't take much time. ;)
I haven't been to Heroes tournaments for a long time. But if, in a Warlords tournament, players are offered unfamiliar maps at a serious competition, they might play, but it would be a death sentence for the tournament, and it wouldn't be held again.