People don't vote on policies.
Sunak could have walked out holding the corpse of a freshly quartered child, ripped out its heart, fed the liver to Larry and the choice offal to Priti Patel, whilst Jeremy Hunt salivated at his shoulder, then holding the remains aloft announced that the augury was favourable to a further term in power... and people would vote Conservative because, "that's what I've always done and always will."