While that may be true, Fitbit was one of the launch partners for HealthKit and debuted their web interface at the Apple Keynote where HealthKit was first shown. Google had info online that Fitbit was working with them from the start to include integrations. They pulled out of both after they had already had a functional integration.

Edit: Fitbit launched their web integration in 2012 and there are mentions of a partnership from both Google and Apple from the same year. It doesn't sound like your statement is as truthful as you may think.