OpenBSD shows nothing. It’s insignificant and nobody is actively looking for flaws in it.
OpenBSD components are widely used. OpenSSH is one example used by most of HN.
OpenBSDs libc is also used by Android as another example. Also widely used.
Time and time again, we see how ports of OpenSSH has vulnerabilities not found in OpenBSDs version.
Not everything needs to be dominant to be successful. That's a pure USian way of thinking.
In fact, we are much better of with it existing. Think of it as a safeguard in case Linux gets overwhelmed or we need to migrate in a rush.
Then we can compare with actual data.