I and some others already asked some time ago, if HealthMonitor could be implemented in PowerUser Mode.
WebAdmin Edition is the suiting edition for an private server administrator for private projects - he can control server configuration with plesk,
but why can't he view the Health Monitor. It should be easy to integrate Health Monitor in that view, too? At least, optional.
I beg you to overthink that decision. Healthmonitor is a useful tool, it can be installed and should be available!
(I found power user view a lot better and used it while i still was able to use the service provider view, because i had an old license - i couldn't use it there, too, that was bad.)