Just because these particular psychics couldn’t cut the mustard, it doesn’t mean it’s all complete tosh. It might be an entirely natural and physical phenomenon that we’re just not informed enough about yet.
There was a very strange case in 1941, when medium Helen Duncan held a seance in Portsmouth, and claimed she was talking to dead sailors from HMS Barnham, when the sinking had in fact been kept from the British public to prevent morale being affected.
The authorities took a dim view of her activities, and further seances led to her being imprisoned in 1944 under section 4 of the Witchcraft Act of 1734!
AVM Dowding also claimed he was visited by his dead aircrew…