First of all, if I don't interfere with the miners' computing power, it will become more and more concentrated in the hands of wealthy people like Bitcoin
But this is decentralization. The absence of a central point which intervenes in the market to keep what it considers as balance. What you propose might sound as a good idea in your head (I strongly disagree), but it's by definition in favor of centralization, which contradicts with the title.
A person who owns 100 other people's facial codes is stealing other people's information. If it is approved by others, why not?
Because then a facial code market will be created, and what you're trying to prevent will inevitably happen; that is, to mitigate from an oligarchy of minters.