People don't type addresses, they open google, type "facebook" there and click the first link. Phishing often relies on similarity between different domain names. Switching to tor domains will remove assumption of reliability of domain name reading.
It will be harder to verify whether an address is real or fake. You would have to trust the search engines. Offloading the responsibility to google basically makes google the DNS provider
Readable addresses means you can go to some site for the first time and be sure it's the address you wanted. It's not a SHA256 checksum, but it's human-doable in some seconds.