Edit: re-read your comment more carefully. To answer: because the exchange was not productive. I only saw general comments equating to "you don't understand our opaque system" without even acknowledging the arguments I was making.
To add to my previous comment. What separates "expert voting" from "leaderboard manipulation" the most in my opinion is the access to the leaderboard state. If experts vote in isolation, based solely on the project info and reports it's a "mixture of signals". If they have unlimited power, and change the scores to shape the leaderboard to a desirable state, it's manipulation.