Why would someone want a peeve as a pet?
Upon searching for pet peeve, one explanation for the usage of pet was
the complaint is adopted like a pet
This meaning I can understand in
where one takes it under one's wing and cares for it. If I were to adopt a pet this is what I would do. Pets are usually warm and fuzzy, and certainly likeable. Peeves less so.
Except for possibly alliteration, why is a peeve, that I must always feel the need to complain about (another searched definition), a pet?