Case law is extensive on this point. And if you notice the statute you quoted, it says preparation for "another person." The completion of a blank form, such as a quitclaim deed has been held to be a clerical function requiring ordinary intelligence, not the practice of law. Further, preparation of a deed only involves practice of law if you are ADVISING another party of the purposes of the deed, what it entails, the negatives and positives of using a quitclaim AND make a recommendation based on those matters of law.
I've never heard anyone in the legal profession make the argument that execution of your own quitclaim deed is unlawful practice of law. You can do just about anything on your own behalf. Sign contracts, write contracts, execute deeds, wills, trusts, represent yourself, negotiate on your own behalf. It's when you do these things as a representative of another person, and hold yourself out to be knowledgeable legally, that it becomes unlawful practice of law.
ETA: A quitclaim deed just means you're signing a contract that says, "whatever I own in this property, is now yours." It's not effective for anything beyond that.
