FreeBSD does not have a focus on security[0]. Indeed, the defaults are notoriously insecure. There was a textfile floating around on how to bring it up to some standard but it eludes me. So it’s a low bar, but freebsd is great under low memory conditions, it has a rock solid filesystem baked in that is gold-supported, one of the best tracing tools known to mankind and very clear documentation.
That’s the power of freebsd. Not security.