I think Apple minimizes the importance of Lockdown Mode because nontechnical users will be confused when some things break when it is enabled, resulting in poor user experience and increased support burden.
Lockdown Mode does effectively block active zero-click exploits.[1][2] Despite who you are, how does it feel knowing your device is hackable and that there is an option that makes it less hackable? Considering that Lockdown Mode has almost no downsides for technical users (other than disabling shared albums), I think most people should have it enabled. I'm not a public figure, but I am a sysadmin that manages resources for many clients. I'm not likely to be targeted, but I'm not going to disable it (and thus make my devices vulnerable) just so I can share photo albums.
[1] https://citizenlab.ca/2023/04/nso-groups-pegasus-spyware-ret...
[2] https://www.wired.com/story/apple-iphone-spyware-101/