You cannot train for the medium range in wc - not true wingchun anyway because there is no medium range in wc.
This is more rubbish and misunderstanding from you.
Of course there is medium range - which can be defined as just outside 'the pocket'.
You really think that they assumed that in a fight everyone would just politely raise their arms and come together to do chi sau?
There are kicks in WC. These are not long range, they are medium range and even can be done close range. This alone already disqualifies your ridiculous idea of there being no medium range.
Further, many of the parries and counters become medium range if one chooses not to step in so much. An easy adjustment that does not really change anything but requires training.
It would be considered more dangerous than fighting at close range since there is less control, but against someone trying to take you down this adjustment may be needed.
I have sparred at this range and can say it is less comfortable than the familar infighting range but can definitely be done and the same principles apply.
With respect to wsl, if he had really said that quote that you put up, he had never experienced how fast is a shoot from a trained college level wrestler of which there are many in the States. Hong Kong in the late 50s and 60s was not exposed to that kind of threat.
Especially when said wrestler is MMA trained, he will chain it with feints and strikes to change level unpredictably.
If he meant judo then I will agree. A proper wc stance as in siu nim tao with proper structure and biomechanics and sensitivity can be extremely difficult to uproot by a throw by a judo trained exponent. However a wrestler who does a single leg or double leg takedown or lift will be able to remove the base altogether from the wingchun fighter.
It's a shame he doesnt elaborate on the quote.
He is likely referring to grappling the upperbody yes.
However he would likely consider a double leg shoot as an invalid method due to the risk of being downward elbowed in the base of skull or spine.
Can I see some evidence of WC working where it was designed for, the street.
You want Hong Kong street fighting footage?
WC has a long history of use in street fights and amongst gangs and triads, so they know that it works it's reputation in that arena is very big, but how much that translates to the type of combat sports we are discussing is a different issue.