I doubt the issue with keeping Gags/Friz is about wanting to keep them; rather, it's about losing roster spots for younger players with a long-term future.
If we have a very strong chance to win a premiership this year or next year, I can see having those veterans could be key, but given our window is not likely open yet, despite some excellent progress this year, all we're doing by keeping veterans is blocking a path to FG for a younger player who could be the real difference when our premiership window is open.
The Broncos, coming off a premiership and with a stacked roster, gambling on a short-term vet makes more sense than for a side still building imo.