I think my colleague wrote quite clearly " It depends on every component if it works with Joomla content plugins or not."
Which implies, that it is ZOO which does not support FusionCharts, because it is not processing other Joomla content plugins. FusionCharts is not processing any plugins, it just generates the flash chart object.
Nothing else to say, except you might want to contact ZOO developers, because in this case, they are the ones who need to update their code. (or maybe it just needs to be allowed within ZOO I am not sure as we do not use this extension)
For sure, by-design, there is nothing that can be done in this matter at FusionCharts end.