Then you don't have control or visibility over Apple or third-party apps sending analytics likely without your approval.
LuLu has a fatal flaw: it drops or closes TCP connections randomly resulting in dropped SSH sessions. No amount of TCP keepalives on the client- or server-side will resolve this. This makes it a non-starter for anyone doing anything real.
Also good:
- BlockBlock - disk access application "firewalling" on top of macOS'es privacy & security settings is very good
- RansomWhere? - ransomware process mass file change interception
- ReiKey - input interception monitor
- ProcessMonitor, DNSMonitor, FileMonitor, TaskExplorer, KextViewer, NetIQuette, Dylib Hijack Scanner, KnockKnock
- Oversight - webcam and audio hijack monitor (although I use ancient EOL Growl + Hardware Growl just to catch hardware events too)
- No longer useful or usable: Do Not Disturb, LuLu