It was a brief period of those parties being “connected” with their membership that was the oddity, the outlayer.
Other than the Johnson-and-Truss period for the Tories, and the first half of the Corbyn years for Labour, there has never been as much input from the membership of either party on it’s actions historically. It’s a recent thing that the membership even gets a vote, on the rare occasion that they do. That’s why all three ended up upsetting their entire parliamentary party… the parliamentary party never wanted them in the first place