To start the frequency of the electricity isn’t the issue. Second all modern electronics use switching power supplies which don’t care about frequency. That’s two incorrect things just in the second sentence that they literally said was fact.
I’m pretty sure that “your electronics” in this context is most likely referring to the grid operator’s electronics, not individual personal devices. In that case, frequency is extremely important- if you like grid stability and dislike blackouts, that is. 😅
That’s a ridiculous way to define “your electronics”. The original commenter was trying to fear monger with incorrect information, and you are jumping to protect them. I didn’t realise the grid owners had astroturfers in the fediverse.