There are a few points of view to this:
- When you want your devices to communicate with each other, enabling isolation works against you
- The security point of view is that enabling this setting helps preventing lateral movement, especially when it comes to malware, for example ransomware.
This means one should carefully weigh these mutual exclusive points of view against each other. It depends highly on the case. Of course a safe network that is of no use for you is also not desirable…
I’m just saying this so that people understand the consequences of enabling or disabling this setting.