Laptop has keyboard, you can type your password with the same speed as pressing your finger and waiting for it to unlock.

Most casual users won’t even know that their laptop has a fingerprint sensor.

When a company needs a proper security, they buy every user a hardware token like Yubikey.

But most of all, it comes down to the tradition. Manufacturers won’t add fingerprint scanner because users do not demand firgerprint scanner. Users do not demand fingerprint scanner because they are used to have no fingerprint scanner. Try removing a fingerprint scanner from a phone, you’ll see your sales drop like a brick.