Is source-available more open than closed source? Yes.

Is fair source more open than source-available? Yes.

Is open source more open than fair source? Yes.

I don't see any attempt at communicating otherwise. Nobody is claiming fair source is as open as open source. Fair source is very clearly defined as not being open source, but it is closer to open source than the alternatives, and even becomes open source, and that's a good thing. We should all be happy about that. But people still find fault...

The OSI doesn't have a monopoly on the word "open." It has meaning, and in these cases it's being used appropriately. It's not an attempt at openwashing.