That's cool. I have met Rob too, I dont see him chiming in to say anything about him and Akuzawa sensei being "pure internal" or even being the slightest insecure about this. And yeah, i think all of the above mentioned are great martial artists and fine teachers.
Its like if you're a photographer or a programmer or some other kind of professional, you dont go and say all authors in the field are the same, and you dont say I will only read from this author and no one else. And you certainly wouldnt settle to study from one book alone, and never invest in your learning from as many sources as you can. Is this a competition for exclusive teaching rights in some way? Why?
For me, no, because I am not a teacher on the circuit. All I know there are people out there who claim to be teaching aiki but at the same time claiming that what others do is not "neijia" or that some are not using pure jin or pure suit or whatever. It would be hard to admit there is a bit of discrediting going on.