If you're directing your peace-time policy based on a hypothetical worst that can be done in war-time, you're going to have really insane peace-time policies. If war were to break out tomorrow, we might want to institute a draft, I guess we should start drafting people now?
Nobody would blink twice if TikTok were turned off during a war so I'm not seeing how that hypothetical is relevant to anything.
I'd expect phone lines and internet cables to be turned off during a war too, but I'd be absolutely insane to demand that we cut them now, because of some hypothetical harm that might come if a very particular kind of shooting war between two nuclear powers (that somehow does not end in nuclear war) broke out.