Somebody at Microsoft needs to put down the crack pipe
So which is it? Either you really can't manage this computer, in which case the response to pressing "Yes" could only be "I just told you you couldn't manage it! What are you, stupid?", or they don't really know if you can manage it or not, in which case they shouldn't say "cannot be managed", and maybe should say "we don't think we can manage it, but we're willing to give it a damn good try if you ask us to".
"Computer \ACME cannot be controlled because it is not running Windows NT. Would you like to create an item in the management console anyway?"
Management means so many things today...