Like the Conservatives, Labour is always guaranteed to be at least the second largest party, even if that entailed having only 80 or 100 seats.
No one else is ever going to come close to that.
Numerous Conservative MPs over the last 35 years have held, and continue to hold, views that ought on paper to be utterly unelectable in any constituency, such as the privatisation of the NHS.
But it doesn't work like that.
Although a bit of analysis of the views that held sway in the governing party might not go amiss occasionally.
There never, ever is any.