Platforms like Windows and Chrome can also use it for remote attestation, i.e., verifying you haven’t bypassed security controls and locking you out if they think you have.
I keep mine enabled because it’s good for secure boot and secrets handling.
You hold down Shift while restarting or booting and you get a recovery menu. I don’t know why they changed this behaviour.
Come :) the ‘venomous animals will kill you in Australia’ thing is bullshit away, I rarely see snakes or spiders, and if I do I leave them alone and they leave me alone.