Would it not be more accurate to say that one can select units
in which c == h == 1, and that the particular values they have in
(say) the MKS system of units are historical accidents based on
the way that system was set up.
It would, of course, be possible to set up units in which c and
h had other values -- say, pi -- in which case the case for what
some posters have referred to as a "digital universe" would be
even more far-fetched.
-- Jay Freeman