Surely if anyone's pushing an agenda of the Taiwan issue it's the geopolitical entities that have extremely strong financial incentives to do so.

If you define "country" as being an entity recognised as a country by some percentage of other countries, then sure, you'd exclude Taiwan. But Wikipedia worked out pretty quickly that this is a terrible definition when a thousand microstates all recognised each other but didn't recognise any "actual countries", and then claimed that Belgium no longer existed. So instead they use a policy of "does this geopolitical entity operate in the way that humans typically understand countries to operate". Taiwan passes that check.