I have no clue where they got the idea that all of these movies have to be connected in such a way. The last time I saw someone attempt to make all those movies canon to Craig's run, it resulted in the infamous 007 Legends game.

Continuity in the films before the Craig era has always been dodgy at best. OHMSS makes a cheeky reference to "the other fellow" and FYEO opens with Moore's Bond visiting the grave of his late wife when he's suddenly ambushed by Not Blofeld. But on the whole, those adventures were self-contained.