Sorry but your integrity doesn't count for anything versus a cryptographically provable system. Honest people lie sometimes, math never lies. Maybe I will just make my own lottery using this protocol, I bet everyone will use it since it will be possible to prove the winner was randomly selected. But I probably wont because I really don't give a shit lol. Do your lottery however you want, you can have people trust you, or you can use a system that proves the winner is randomly selected, it doesn't matter to me (I am not the one who had people accuse me of running a rigged lottery, imo you should be happy I showed you a system that will let you prove them wrong).