Yeah I’m not a native english speaker so I’m not sure about the correct terminology. Oversteer is probably better one here.

That’s the messing around part.

I genuinely have no clue what you’re even disagreeing with.

There are only two reasons to pull the emergency brake in a moving vehicle: either you’re messing around and making the car fishtail was the desired outcome, or your regular brakes failed and you need to stop fast instead of just coasting to a halt. In the latter case, the vast majority of people will lose control of the car immediately and it will be absolutely terrifying experience.

Go pull a handbrake on a highway speed simulating an emergency situation and then report back. I’ll wait.

And then, eliminating the brake fluid, reduces the residual torque and the drag between the pads and the discs, which improves the efficiency and the durability of the braking system.

Source (What an awful website)

This does still have brake pads and rotors. The brake lines just get replaced with wires.

Pulling the handbrake on a moving vehicle is generally speaking really bad idea. It’ll stop, yeah, but it’ll be really scary for a moment before that.