What you actually mean is to lazy to do their job properly.
Just like my last employer where I spent a lot of time finding the simple things the developers didn't do (but would cause havoc with Google if we let it launch in that state)
> Why would anyone even have them be two separate machines with the same content?
They are in different locations. openbsd.org is updated first and in the same (physical) location as the CVS servers, build equipment, etc., and www.openbsd.org and the other mirrors are mirrors with much more bandwidth.