This about Esta: Although he is ambitious, he has no ambition.
He has been told that as a 6th-circle he is one of the people who makes Cheliax, and this is not wholly wrong. But Vicar Esta has always made Cheliax to someone else's vision and instruction.
Rugatonn is the one who has a vision for the Church.
Abrogail Thrune is the one who has a vision for Cheliax and a vision for Golarion.
And what this all amounts to, in the end, is that Vicar Esta has never once in all his life been told by anyone to think ahead to the equilibrium, you fool. That level of thinking has always been the job of his superiors.
When Esta imagines the value of radio, he imagines Crown and Church knowing about radios, building some radios, distributing those radios to useful recipients, and those recipients then using those radios as directed and as Esta imagines it useful to Cheliax for those radios to be used.