> AFAIK it is useless

"Useless" is grossly incorrect. Bitlocker is not invincible, but it lowers your threat surface by a huge %.

In real terms: if i get your unbitlockered hard drive, i own your shit. It's not a hack you pay crypto for on the dark web, it's a trivial compromise that every person in IT has known for at least a decade. If you google it, you'll find it. Ring 0 access to all nonbitlockered windows installs. Takes like 2 minutes and a usb or cd.

With bitlocker, at least every idiot on the planet can't login to your profile; that's not nothing