People use PA for the safety of trading with PayPal.
If someone were to chargeback after a trade conducted on PA, PA would take the hit for the chargeback, and the seller would be unaffected. Hence they are so popular and widely used. Best platform to use PP.
However, accounts can always be recovered by the original owner. AFAIK, PA will reimburse you on an account that's been recovered from you. Don't quote me on that however.