I agree with Sir Humphrey. It can very much depend on the SM.
I’ve been involved with countless strata managers in several states and many strata schemes over the past 37 years.
Some of my best SMs were not all that strata savvy. But they did know how to be good managers and that’s certainly a very worthwhile credential. For strata issues that went beyond their strata experience, they consulted with more experienced SMs.
The best SMs are of course those that understand both management and strata.