The big difference between a social credit score and WoT is we will get to choose who is providing the scores we see or we can turn them off.
So if I feel I'm seeing a bias in the WoT scores I see that I don't like, I can change score providers until they fit better with my expectations for known accounts.
I can't control whose score of me you see or how a provider scores me but that is down to classic freedom issues. I have to just trust that others will make wise decisions because the only other option is to use force against them.