I'll throw in my agreement with Richard and Gary here.  I
understand and agree fully with the author's intentions, but
the tone of the story turns me off completely.  Messages
in a work are fine, but you have to be careful that they don't
interfere with the effectiveness of the story; at that point,
you're not writing fiction, you're writing a tract.

The story isn't even really being written from the wife's point of
view since she doesn't describe what she saw and experienced,
and describes events that she was not there for.

That's dodging the issue a little bit.  The parts that describe what
happened to Ranma were not preachy.  The wife's reactions in the hospital
were preachy.  And no matter whose perspective the story is being told from,
the preachy tone of the story was unnecessary and a bit of a turn-off.  From
a story-telling perspective, understatement would have been far more
effective.

-Richard