Are you saying Erdogan replaced pro-Ataturk generals with pro-Islam generals, and that led to more Gulen followers with control of troops than there were before?
I'm not saying that they weren't legitimate. I have no information one way or the other. But if the regime wished to exploit the failed coup for political reasons, faked statements are one standard way to do that.
A stadium full of Gulen supporters cheering for Erdogan, just 4 years ago.. https://www.youtube.com/watch?v=_bP7r0U8mfg
Erdogan's speech; "I wish Gulen was here with us today"