You make a good point.
However, I've got another counter one.
Has anyone ever indicated otherwise that the Yoma are more then just
automated, non living things?
Example: The way Luna describes the Yoma in the first few episodes,
she gives pretty big insinuations that they aren't alive. She
probably did this so Usagi would "dust" them without guilty feelings.
Now, I know you're going to say "What about Kunzuite/Malachite and
Mettalia plus all the other season enders?"
My answer to that, she was in "Serenity Mode" at the time with
Kunzuite and acctually was only defending herself (Kunzuite died
because he never took a deflection into account) as for Mettalia and
all the other season enders, the bad guys escalated the battles to
where she had to bring her powers up to deadly levels to survive.
The Flashman
May The Spirit Preserve You!