That may (or may not be) true in the ring scenario, but kung fu was never about ring fighting, it was and is about actual combat. Ring fighting can be a testing ground for some, not all TCMA combat aspects. Do you doubt that Alan Orr can fight for real?
For ring fighting you may need to be in "prime", but as a kung fu fighter, not really. The whole TCMA training aims to make you effective (and healthy) well into your old age.
I am curious to know why you make such assumptions???
I don't really think that there is a problem.
More assumptions.
Did you know that Alan also organizes or at least organized contact chi sao competitions?
Also, chi sao was never about real fighting, but it develops attributes and ultimately can turn into real fighting once the rules are loosend up, turning it into "free hands" fighting.
The concept of whole body unity is prevalent in all TCMAs, albeit in different ways.
KUng fu training is not strictly for ring fighters, nor is ring fighting an ultimate goal of TCMA training.
Also, people who train basket ball players, baseball players and even boxers and wrestlers, can be referred to as "coaches". In my humble opion, kung fu teachers should always be referred to as sifus.
Most people, including those who train and even claim to teach kung fu, don't even understand their own very style, let alone someone elses. I have trained two kung fu styles and most people who claim to train kung fu do not understand the approachs taught to me, and I am no sifu, but an intermediate student in Wing Chun and even less so in Chow Gar.
So, as far as kung fu goes, the real McCoy is very difficult to come by out there. You are more likely to find a Wing Chun school without elbows, than real authentic school.
Without "whole body power", and or, whole body unity (and there are different types), one cannot have real kung fu. The best one can get is an empty shell kung fu, that does not deliver.
The other guy can use all the "theories" and "concepts" against you, but if you can explode onto and through him, then he will have as much chance of deflecting you power, as child would, using the same principles against a fully grown adult.
It seems that the PB guys focus on elbow alignments, but some how do not "linger" on the elbow (and knee) striking. There is only one PB guy here that says that he practices this, so one starts asking questions about those who don't drill these important weapons, that are present in probably all of the kung fu styles on the planet.
So yes, different lineages will have different ways, but when members of one lineage act like they have discovered the holy grail and enter a thread and criticize a sifu from another, and he defends himself, we should understand why.