Because they seem to be seriously in denial (boom, boom, *tish*).
It’s (local) election time again and I can’t recall whether other political parties are the same, but whenever the Tories are expecting a kicking (or later on, getting one), their talking heads always give me the impression that their view is that the voters have somehow “got it wrong”, as though they accidentally put their cross in the wrong box on the voting form or were just too stupid to vote for the “right” party.
The idea that an awful lot of people really aren’t happy with what they’ve been doing for the last few years isn’t something they appear able to get their heads around. Even the idea that they might improve their performance with a change leader at this late stage of the proceedings miserably fails to recognise that many peoples’ reaction will be “What? Not again! Can you seriously not find a single competent leader amongst the lot of you?”. Of course Boris had all the competent ones kicked out when they wouldn’t unequivocally support his loony ideas. Perhaps if he’d kept more competent MPs rather than “yes men” he’d still be “Big Dog” now, rather than an even bigger donkey.