Even more lols when you are gigabyte and your private key leaks. Also when you are gigabyte and your signed driver is used to privilege escalate malware.
And that’s why certificates can be revoked, that’s the whole point, trust. It only costs a few hundred a year per Microsoft’s documentation and approved vendors so it doesn’t seem that much of an ask. At the very least you can look up the developer yourself, harder to do if the package has no identity associated with it