I'm a member of a British public, am I not? This is just how I see things. Of course, other individuals can speak for themselves
Of course they can, and thats the point. Your point of view is rooted in your desire to see Labour retain power, despite being roundly beaten in this election. You also are willing to overlook a second Prime Minister in a row being imposed on the country by the Labour Party without popular election, something that could severely alienate the British public and backfire on them catastrophically. Is it in the spirit of how people want their leaders chosen? The risk is that frankly it makes Labour seem arrogant, and like a bunch of spiv fixers. We have a parliamentary system but leadership is still a factor in decision making during an election. As soon as Gordon Brown put himself up, lets face it, he was routed. Is David Milliband, for example, such a salt of the earth character that he would be welcomed as a messiah? He is a dictionary definition of a Blairite New Labour career politician artfully climbing the greasy poll of the Labour establishment to get to where he has. These are things the electorate will be aware of.
You also say that there could be a general election sooner than later, so why not go into principled opposition, get a new leader and front bench, and seek to reclaim power through popular mandate then?
The possibility is that the electorate will, frankly, react against this, and in the long term that could do more damage to Labour. You have to allow that this is a potentiality. The Labour Party needs to think long and hard about this and the spirit in which it is being undertaken.