I have just one comment to make here that ties in with a few other comments about the fact that Minbari are aliens, and do things in an alien way.
Is everyone forgetting that compared to the rest of the galaxy (Excepting the old ones, who before the war even the Minbari didn't really know anything about) there is no one even vagely close to the Minbari in technological level? In "In the Beginning" Londo tells Humanity that even at the height of the republic the Centauri were afraid to sneeze in the general direction of the Minbari, in case it was taken wrong. They are just that much better than EVERYONE else that they have ever met.
So, this means that they have no enemies. This has gone on for 1000 years. No one messes with the Minbari. This would tend to lend a certain air of complacency, don't you think?
As a comparison, if you are in central Africa, in a tank, do you really care if you have to jump up and down three times, whistle the star spangled banner backwards and smack the tank driver in the head with a fish each time before you can fire the guns, as long as all you have to face are a few lions and some natives armed with spears?
In fact, don't you think it is altogether conceivable that such rituals might spring up so that the warrior caste, which is very proud, will not have too easy a time of it annihilating anyone else around, whilst simultaineously being able to show off their martial skills to allies. And eventually it probably came to the point where the only challenge to come around was other Minbari vessels during war games.
Once the shadow war came around, though, the Minbari were shaken out of their sense of complacency, however, and such frivolous methods would have been scrapped. The Ship is, after all, 20 years old and out of date. Anything newer is undoubtedly designed along much more militarily organized lines.
Anyway, just a thought. . .
------------------
"In the Beginning the Universe was created. This has made a lot of people very angry and has been widely regarded as a bad move."
-Douglas Adams 'The Hitchhikers Guide to the Galaxy'