This is insane. For almost 30 years we were working like the original poster described. Actually, in any server-client prepress environments, the users are actually discouraged to make 'local copies', because this compromises data integrity at the end.
The link you've posted is targeted to 'anyone'. But what about professional environments? Eg. our clients are MacOS computers, the server is also a MacOS system, and they're connected via a rock-solid gigabit Ethernet network. No other applications – network intensive or not – create 'disk error' messages. This is definitely a Photoshop problem, introduced some years ago, around CC 2014 or 2015.