I can only agree. If something doesn't work, and you think debian has screwed it up, type

     reportbug rubygems

and write up what's wrong. It often takes quite some time to fix stuff, but often it is fixed eventually.

(Note that by Debian policy, dependencies that are only for some actions of the module might not be hard dependencies, but "recommends" dependencies; but you can configure apt-get/aptitude to install those for you too).