Office cake day and gender roles

[BluePatriot]

Poll question: Office cake day and gender roles

We got a memo Friday for cake day. Every month employees bring in two cakes for birthdays and we hang out in the kitchen eating. My supervisor and I noticed something missing from a memo distributed about cake day and who was bringing food -- men. It's a small company but there are enough guys around for this to be a minor/funny/obvious oversight. Both female members of upper management, all female supervisors, all listed to bring cake...The memo was sent out by our female HR manager so I dropped her a light-in-tone email along the lines of "hey, the guys not capable of making/bringing cake?" cc my supervisor. We are both female. Well...instead of getting an "oops. let me find some volunteers" I received a reply of the cake day being totally voluntary and if I did not feel comfortable bringing in cake they would find a substitute. LOL. Somehow I have a feeling I will be painted as an anti-cake reactionary. I decided to opt out on principle and made it clear that it was because there were no males on the list that was distributed throughout the office. Did I do the right thing or am I being too anal? I feel like stuff like this should be pointed out in the workplace even if it seems minor.

*edit to clarify: memo was distributed listing cake "volunteers" from which you could then opt out if needed