FTTH question: Should I run fiber or Ethernet to networking closet?

Just switched from Comcast cable to Frontier fiber. Love it so far. They came and spliced a fiber from the street to the back of my house. The fiber is then terminated into the Frontier supplied ONT. The ONT has an an Ethernet port that I will be directly connecting to my WiFi router in the house. I had planned to run CAT 6 from the ONT on the back of my house, up and into the attic, then down to my networking closet where the main router resides. Then I got to thinking: why not just continue the fiber on into the house and to the networking closet, moving the ONT there as well? I had really hoped to be able to skip the ONT all together and plug the fiber straight into a SFP GPON capable port on my Cisco, but Frontier won't whitelist customer owned equipment unfortunately. Should I run Ethernet or continue the fiber on? Any thoughts or suggestions?

Thanks.