David Attenborough is also more journalist than scientist, and also under attack by scientists for supporting "pseudoscience" -in fact for signing a letter raising concerns about suffering of primates in neuroscience experiments.
I expect scientists to objectively investigate and consider ideas when proposed seriously, even, or maybe especially, when put forward by non-scientists. However often the first reaction is to pile in to defend their own careers and territory.
Paleoanthropolgy has and will always involve a degree of speculation just given the scarcity of physical evidence. Very often any hypothesis has to be well developed before scientists can even understand which observations and data are relevant.
Response to paragraph 1
But he is a scientist though, and one that I respect enormously. He has been a supporter of what originally was the aquatic ape theory/hypothesis for some years. As far as the suffering of primates in neuroscience experiments is concerned, I too have concerns. I'm not sure though why you think that such concerns have been linked to 'pseudoscience'. Perhaps, you can give some details.
Response to paragraph 2
And so do I, emphatically. Unfortunately, many scientists, especially anthropologists, have given many cogent counter arguments to Elaine Morgan's AA ideas and speculations over the years, basically because they are over simplistic rather than in line with genuine and objective research, wherever that may lead. If you wish me to, I could easily give you plenty of examples of her lack of rigour, although it would probably be boring for the general reader. Indeed, I may be wrong, but I think that she never produced any study which has actually been peer reviewed. It comes as no surprise to me that the original hypothesis of the aquatic ape has been watered(pardon the pun) down to become the 'waterside ape' of today.
Response to Paragraph 3
I agree with most of what you say above, except for the end part, where you seem to suggest that scientists have to wait for an hypothesis to be well developed before they can understand which observations and data are relevant. Indeed, scientists are usually responsible for actually producing hypotheses on the basis of observations and data which they do understand, and then submitting their findings to their peers fror critical analysis.
And as a note to Gonners, here. She
was a "very sweet and funny little old lady" as she died in 2013.
And, finally, I shall be listening on Wed. to the talk on Radio 4 with an open mind, and, especially, because new evidence is promised.