Exactly. If something can't be proven to be "samey" because of "subjectivity," why do people make the assertion as if it could be proven?
This right here is the confusing part. @Neonchameleon started a thread asking if 4e powers are samey. I can't imagine that he(?) did so just so people could say "I like 4e!" or "I don't like 4e!" and have those opinions just sit there. A simple poll would have sufficed.
Surely, it was to investigate if the powers were, in fact, "samey" in some distinctive way, and if so, what is distinctive about that way. This would involve coming up with a working definition of the term, comparison with other editions of the game, etc. Providing premises that logically follow to a conclusion. That kind of thing.
(@Neonchameleon , if it turns out this really was just a roundabout way of hearing why people did or didn't like 4e, I do apologize.)