No-one has ever suggested that every silly "crayonist" idea should be taken seriously. The idea of a unified transport hub is obviously not silly. It now, very late in the day, is being taken up by TfL.
I'm sorry but this is a very feeble counter-argument. We are not discussing other idiotic ideas that make no sense.
The facts on the table are clear. It was evident from the outset to anyone with a rudimentary understanding of how Londoners use public transport that a new station at Old Oak Common used by HS2, the Elizabeth Line and GWR would become a major public transport hub which people from many parts of the Greater London Area would need to access. Facilitating this adequately was not incorporated into the original plans for Old Oak Common Station. Now TfL have woken up to the idea that a connecting station on the North London Line makes sense. No-one, not railway professionals, not civil servants, not politicians, not railway journalists, not enthusiasts in this forum, absolutely no-one has suggested that TfL's new decision is foolish. Therefore it is legitimate to ask why this decision was not reached years earlier.
If "decision makers" did take notice of what the great unwashed were suggesting and rejected the idea, they got it wrong! If they didn't even analyse the idea, they got it wrong! If they acknowledged the merits of the idea but felt it was too expensive to include, they got it wrong!
So, who were the decision makers? When I blamed railway professionals for this mistake, it was pointed out that politicians make the final decisions. I have questioned if politicians received appropriate advice and it seems no-one knows. As we cannot apportion blame with any precision, we also can not absolve anyone from responsibility. What we can say with confidence is that it would have been better and probably cheaper to have planned from the outset for a major transport hub with links to the West London Line, The North London Line and the Chiltern Main Line.
Thank you very much for this. It throws much light on the subject.