Those in the "yes to direct.uk camp" must realise that the more people they ask, the more "no" is going to be dominant. Imagine asking the owners of all 10,000,000 existing .co.uk domains for example (assuming that the repercussions of direct.uk are explained clearly and simply enough).
More consultation means more chances for Nominet to get hauled up in Parliament, exposed in the mass media, etc. even while collecting more and more negative responses to the whole concept.
I could be wrong (we're all guessing here I believe) but I feel that "more consultation needed" is the least likely of all outcomes.
The folks at Nominet can perhaps be accused of many things: greed, short-sightedness, a willingness to disregard the prevailing public opinion, etc. But stupidity? I don't think so... and it would be a genuinely stupid move to re-open the consultation process and invite another round of public pillorying.
When you consider this whole fiasco I can't see how you rule out the stupid bit.
After all the lack of other qualities you allude to amount to stupidity