Because when you get a new device and go to Developer options, the "Allow OEM Unlocking" is greyed out, you can't toggle the setting, I looked it up and its some weird Motorola BS that their server have to "verify" your device or something, and can take a week, for me it was about 6 days.

Lots of vendors rewuire you to get an unlock token/key unique to your device for you to unlock the bootloader. They make you wait one week before they give it to you after you request it.

Its worth noting you also need to go to the Motorola website to "request" an unlock key. You do some fastboot commands to the phone and then pasting those results to the website (its like 5 lines of hexadecimal stuff that is unique to each device, you paste it to the website as one single string of text). The website seems to be automatic, there doesn't seem to be any humans involved. You also need to create a Mototola Account to get the unlock key, but those account don't need a phone number so you could just create a throwaway. I got the unlock key on day 0, but the developer settings toggle thing needed 6 days for me.

Idk what that is, but the official one is this: https://en-us.support.motorola.com/app/standalone/bootloader/unlock-your-device-a

(TLD ending in motorola.com/ is official site)

Yes you have to agree to give up the warranty. But I never remember ever having to file a warranty claim anyways, and I value the freedom more.

Edit: And you don't need any weird binaries, at least on linux. Its from the official repository that the distro uses.

For the platform tools, I used:

sudo apt update
sudo apt install android-tools-adb android-tools-fastboot

You don't need official ones, just need to have an active enough community for someone to get all the features you care about working