[FriedPickles]

Can't say I personally believe that claim, but there are a fair number of people out there who do. One person even sent formal test results showing that the adapter drastically reduces EMFs coming off the case. Not sure what to make of it but I found it interesting.

[kube-system]

The concept of grounding devices is a safety feature, broadly speaking. /shrug

It's a stretch, maybe an oversimplification, but I don't think it's a lie.