As a Linux user, I wholeheartedly agree with that sentiment, but at the same time "security through obscurity" has its biggest problems when the thing in question has more visibility and is subject to higher scrutiny.

There is the argument that Linux is more secure because it is better written and the code is open for in-depth review, where Windows just hides its gaping security holes; while that is all true in a respect, Windows has so much more of a virus problem than Linux primarily because it is more widely used, making it a higher value target for attacks. Heck, even the Linux base of Android isn't keeping it from getting tons of malware, now that it is a prominent OS. So, I think that, even with the huge shortcomings of a "security through obscurity" model, there is something to be said for keeping a low profile.