Andy, rather than deal with the abstract where we keep taking past each other too ofen..
Which version of gojushiho and which techniques are you talking about. can you go to yahoo or youtube and find something similar?
At a real level almost any technique can be successfully applied if you've been sufficiently trained. Of course that make take a decade or two for some techniques but if you eperience someone who can do it then it's not impossible.
I practice a version of Gojushiho, but it is rather unique as it is similar. Boomer on this list practices it too. And I've seen many others.
So lets get in the dirt, actually what techinques really can't work. i'd like to see what you're referring to, and make up my own opinion.
Of course one of my instructors shared a way of looking at the 8 isshinryu kata and using the movements for 800 applications with no changes. I might see things a little differently than you do.
bushi no te isshinryu
offering free instruction for 30 years