A lot of individuals and organizations would disagree with this. A fresh install can also be used as a preventative measure. There is less down time in preventing problems, than there is in fixing them.
And, everyone is free to be wrong

and we can choose to disagree...
OP was asking about routinely reinstalling on some regular schedule, which, in my view, is quite different from a "fresh install".
(and this isn't MS Windows, where a reinstall might be a good first step

)
An OS X reinstall won't do anything to fix corrupted user files, for example. User issues may need some "fixing"/troubleshooting to find that, unless the user is some kind of network user that can easily be reset.
And, the OP did not mention any issues, and just asked about reinstalling.
When no issues are reported, it's just a waste of time, and results in unnecessary wear and tear on the boot drive.