OpenBSD as a complete OS includes highly modified and integrated services including DNS, Web, SSH, SMTP, NTPD; activating these components is trivial and there are no special compromises or unique approaches to doing so. OpenBSD is simple like any UNIX should be, and that simplicity means running services is quite easy and these services are secure by default. Lots of other OS may not include these patched, and in many cases, original services. If you think it's all about a service-less default install being the goal, you're being shortsighted.