@erik_squires you have not read the standard, so let me educate you: it is a standard for medical devices and how to protect them from spikes in electro magnetic radiation.
I could say the same to you. Fortunately the literature is in the public domain. The reason there is a medical standard is about leakage current forming in devices which patients are connected to, not surges. I don’t think this helps my audio sound better, but there is evolving literature that says isolators are better at preventing surges inside a building. An important part of your overall surge protection strategy. I don’t let my internal Ethernet or router connect to the network provider without additional protection. That means either gas discharge, air gapped optical fiber or one of these.
In particular, dedicated Ethernet surge protection devices which shunt excess voltages to ground, seem to have a negative effect and are more likely to enable dangerous lightning induced surges.