It's this tl;dr attitude amongst politicians that has got us where we are. Nobody does details, but the devil is in the details. Tbh nobody even does the big picture.
Rogers believes that no deal isn't inevitable, but the mostikely outcome nonetheless. It suits the EU, gives them all the leverage. Johnson can't revoke, he can't have a referendum, he can't have a GE, he can't renegotiate, and he probably can't extend. His only option is to try and renegotiate and blame the EU for us crashing out. But then what? Part of the argument underlined here is that it suits the EU to keep us in limbo for years or decades as they will have complete assymetric power over us. Unless and until the UK basically go back cap in hand and beg for the WA, there will be no trade deal. But it'll be politically impossible for the tories to this.
Basically, this might be worse than anybody feared possible 3 years ago.