20-100 OpenBSD is thus statistically more secure than HardenedBSD because you have fewer occasions to use it.
Or, you have to "compromise security" yourself to make the system a bit more useful. For example, I've turned off the default library re-ordering, and the kernel-relinking on every boot; compiled my usual programs (WM, xearth, ...) myself because pledge/unveil and friends make the ones installed from packages fail in mysterious ways.
Of my installed OSes, OpenBSD gets the least use because I feel vaguely guilty each time I make these kinds of changes of convenience to the system.