It's perfectly obvious that the man finds no merit in the use or sound of the guitar in Trad. music. I'm sure that these guitarists were more than competent, given that they were invited.
Invited musicians (by loose definition) wouldn't be shite - would they? and I guess he is wrong to slag them off, so, I return to my first sentence.
I love to play my guitar at sessions (ahem !)
Bryn, Bert Weedon never stimulated me to playing with myself, but ooooooooh !! the lovely Muriel Young could have done.
On the same programme WAS a decent enough guitarist for the times – Wally Whyton.