This is exactly what I'm talking about. You've narrowed down the scope of logic to apply to everything !good, which is some emotional value that exists outside of logic. In reality "good" is a vast trove of information which differs in the minds of every party to the problem.

Logic absolutely applies to this set of information!

Wanna-be technocrats should understand that exploring that vast trove of information (which they can't actually do, in practice) will allow a more widely accepted solution.

Accounting for all these various "goods" logically results in messy compromises which run exactly counter to the technocratic dream.

Democracy is an imperfect attempt to distribute the logical calculation of all these "goods" and come up with a big ugly messy solution.

(Some parallels with capitalism exist here)