Morris's skill level or fighting ability really dosn't have anything to do with whether he trained in Ninjutsu or not.
Bussey broke away from the Bujinkan in the late 1980s and when I was there he and top instructors would correct any student who used the term "Ninjutsu" and would say things like "This is RBWI, not Ninjutsu." They'd even say, "That's a half staff" if a student mentiond a hanbo. They were very clear that they did not consider it Ninjutsu.
Obviously, some Taijutsu can be seen in RBWI movements, but the systems are still different. The techniques from the time the first video series was made were similar, but by the time I was in it was very different, and even farther away by the time the second series was made.
In the context of threads on internet forums, it is very popular to equate the two and use UFC 2 to attack the Bujinkan. There are many reasons to criticize the Bujinkan, but this isn't one of them.
Seriously, the post I responded to was using UFC 2 to attack AKBAN, a totally unrelated group started by Israeli Bujinkan instructors. It was more specifically using UFC 2 to attack AKBAN's knife training, and it is something totally irrelevant to the subject.