There are scales of it, reducing luck in the sense that you don't require a perfect course. That a speck of dust ruins your run etc. is, within reason, part of the game. But flying blind into a maze and just randomizing your way through it isn't particularly challenging. Just enter the game with a 100 identical robots and you'll have a better chance at winning.
Multiple mazes isn't a bad idea, but a massive endeavor just increasing the barrier for these competitions to take place.
>... the less worthy ...
Why? The most noble sport is a lottery then? Because that is essentially what you would turn this competition into.