"because they aren’t trained in it."

That's a bit of an assumption. It's because NAS isn't able to run an OS, so the management services that might be needed to handle data file concurrency are also not available, unless the NAS is being managed by a system. Not just Shared, but Mapped.

I recommend this topic:

https://proconnect.intuit.com/community/lacerte-tax-discussions/discussion/no-read-only-on-nas/00/67...