same reason angles and distances change and "blocks" become strikes etc
...you may be correct - BUT the fundamental issue is whether the last moves were ever in the Kata - and if they WERE then......what's an acceptable/practicale "application".....
yes, but my point is that they ALWAYS were blocks/strikes/etc it is just that by "naming" them as such, they almost become writ law?
In a similar way, I think that we have a situation where ALL moves in kata must have some application, I used to think so, now I think that maybe they were strengthening exercises and/or akin to shadow boxing or positions of kamae maybe.
You see, that's my point - maybe there is no "application"; maybe it's paying homage to Budda; maybe it's just to complete embusan; maybe it's a Maori-type dance over the dead bodies of your fallen enemies ( I rather like that one ); or maybe some one was messing around and thought "this is cooool"
Can you imagine Imagine......