Pets ? There is NOTHING in the Bible about Man being created to be "God's" pet.
Created in God's image, Yes.
Given free will, when created, to obey or not to obey God's direction not to eat 'of the one fruit'. Hardly the mark of a 'created pet'.
Lacking Knowledge of Evil. Yes, Genesis clearly states that. What creator, or Parent, would ever want His children to KNOW EVIL ?
Tree of Knowledge, of GOOD ... and EVIL.
Case of reading what other's have said about it, or a 'conclusion' drawn from one's own reading the actual words and digesting same for oneself ?