So, you think that not even the devs working on Bitcoin Core wouldn't see it coming in time of implementing Quantum resistance algorithms? I am sure they are aware and they are bright enough to see it coming. I mean, the technology must be developed, software must be developed and I don't believe that can be hidden from everyone up to a point that nobody will see it coming!
they're trying to develop it but new things aren't always so solid. you need time to try and crack them. like years and years. no one broken RSA in decades so it's pretty solid. but you can't say the same thing about most of this new stuff.
https://www.linkedin.com/pulse/post-quantum-almost-standard-completely-cracked-lessons-roger-grimes