It's also confusing.
Are we supposed to enable Lockdown mode always or only we enable manually when we think we're under attack?
According to instructions in settings, it is supposed to be enabled when under attack, isn't it too late already?
What are we missing...
You’re supposed to enable it if you’re important enough to potentially be the target of an attack. Political dissidents, journalists, government officials, HNWIs with a bunch of cryptocurrency and so on should probably have it on always.
You’re welcome to turn it on even if you’re not in one of these groups, just accept that it increases the friction of using your phone in a bunch of little ways.