I don't think that can be it. Cook, Anderson and Broad only play tests these days; Stoneman and Vince aren't in the ODI side either currently; Root, Bairstow and Ali have generally been adept at both long and short forms.
Well, Boycott was saying that a lot of our team were too keen to go for shots. They should have played themselves in and left balls that didn't need to be hit.
I couldn't watch the Tests as they've gone over to BT Sport, but from what I've read from other writers and commentators, I think Boycott is correct. I know it's the same for both sides, but we've got a lot of young'uns who don't perhaps have the patience.