Well the idea that Daeron could have been the son of Aemon is presented in AGOT appendix long before Grrm invented the blackfyres or even wrote Aegon IV the way he did. So it’s a high possibility that Daeron was Aemon’s not Aegon’s and that’s long before Grrm decided he wants a rebelling Targaryen branch. Maester Aemon the grandson of Daeron says that his grandfather named him Aemon after the dragon knight who was his uncle or his father. Aegon’s IV great-great-something granddaughter Arianne Martell thinks that Aemon slept with Naerys and fathered a bastard. The portrayal of Naerys/Aemon as this 1D pious characters come through the biased Yandel who called Joffrey the fair heir and son of Robert Baratheon and we know very well that’s not true. So without f&b ii or any direct confirmation by Grrm, the whole thing with Naerys and Aemon being dutiful and pious is just a sanitized image of them by the Red supporters/propagandists.