My statement is that we should observe the need for explicit speech in certain contexts, even though it might be impractical to actively encourage it in the masses.

If your statement is that we, as members of the LessWrong community, should spread the use of explicit speech to the masses, then I would disagree, as training people in even small ways like that takes significantly more time than is worth the effort except with very close friends.

Wouldn't this statement also apply to promotion of, say, atheism? Advocating atheism on an individual level also "takes significantly more time than is worth the effort except with very close friends."

Isn't LessWrong exactly the place to make rational arguments over subjects that many regard as trivial, and arguments that are impractical to pursue with the masses of non-rationalists?

I hope that's explicit enough ;)