> Lockdown is literally presented by Apple as being for people targeted by APTs like those developed by NSO Group, therefore I expect it to prevent attack vectors used by these APTs, like exploitation of the Developer program to facilitate sideloading malicious apps. I don't feel like this is an unrealistic expectation, and not having the mode actually do that amounts to security theater, which is a far cry from decrying everything as such.

These APTs overwhelming use RCE vectors that are less obvious then side loading apps, iMessage is probably the most popular and I would hazard a guess that other popular messaging applications (WeChat, signal, telegram, etc) and safari would be next.