Absolutely yes, we've all been assuming security in everything we do up to this point. Knowing that the resources to defend were being deployed faster than the resources to attack, we're not afraid of our random stuff getting hacked, and there's time between zero days to patch things before they can be exploited.

AI turns that all its head. SOTA malicious AI can create novel zero days, exploit them, spread, create more zero days, and essential hack all the things in days. So yes in the old world it was possible to assume a high margin of safety, in the new world given all the out of date everything out there and the speed at which anything is patched - assume nothing is secure anymore unless it is not connected to any network whatsoever - or even listening wirelessly - bluetooth/wifi off.