Well, honestly, I think you may be overestimating the extent to which spitting out a probability estimate on a survey post would have represented "commitment", or would have "determined your initial trajectory" on LW (you could always have done it anonymously, after all!).

But, given what you've written here, I can't complain. As one who cares about this cause, I'm glad you stopped to think about it at all, and even more happy that you've now told us what you thought.