While I take your point Kolibear, "Biggles" chose to hit a tree rather than land in an open field. He infers that instructors now want to know how to hit a tree safely. Landing in a forest is another thing, but I have not seen a CAA safety leaflet explaining the best technique, but I have seen one regarding ditching.
Along with this "Biggles" also said
Most died instantly but a few survived
, does not bode well with choosing this technique when he obviously had an alternative.