I just don't like being called a liar, which is what this denial is. It's saying I'm lying
It's not. It's saying you could be lying. You're a person on the internet so we will never fully know you. What we know about you is wonderful but you must understand we base our decisions on proof. If all proof is against you, that means we really can't do much but believe you on your word. In my heart I do. I do believe you and many people do. But if we accept you, how do we sort out the good liars from the people who are telling the truth, in the future? People would see this precedent and try to get in as well.
Honestly, I don't like the absolute rule against cheaters myself. I can forgive people for murder if they show regret, so obviously I can forgive them for cheating on a game. The problem is... TINA. There Is No Alternative. Or not a good one. We need rules and I still need to see a better rule than the one we have now.
Also please note this if comparing with crime: we are not punishing you. If you compare it with crime, not being admitted in the clan would be like never being allowed in the police when you had proof against you for stealing.
Get your energy from the things the people above typed here and from all those likes you get. The people love you. You don't have to be part of the community to be part of its history or to be friends with many. And being part of the community would not change your friendships here fundamentally. Just try not to think about the levels. Think about the support you get. What you don't get is access to private sections and levels. What you do get is trust and love. It's up to you to value both.