He’s worried about security issues that he himself did in the past, seriously. Look at the reasons and rationale as to why things were done not just for you but also for others.
It isn’t the fact that the admins could spend a few hours going back and reverting and un-deleting posts, topics, etc that you personally removed; it’s the fact that they want to prevent it from happening again. If this was your logic and reason as to why you should get your precious powers back then I don’t blame Liam for not reinstating you.
Apparently you missed the point when I said “show you’re a mature and level-headed adult to deserve them back.“. I didn’t miss the post saying you explained why, I missed you saying “I explained in full detail to Liam as to why I should get my powers back and did so responsibly..” etc. Obviously if you PM’d him saying “Give me my powers back. Innocent until proven guilty.” then I don’t blame him for telling you to take a seat.