Locks (especially doorlocks) are fairly trivial to open, but requires the know-how to do so even if it isn’t complicated. So difficulty of opening a lock is irrelevant, the locksmith did his job and charged you an appropriate amount to have a professional out there to do his thing.
On a related note, my dad once lost the car keys after putting them in his swim trunks while swimming in a river. To get a locksmith out there on a weekend would’ve cost a fortune and we would’ve had to wait almost a full day. Thankfully the owner of the tubing place we did our rentals from had a kit to jimmy the lock open, i was surprised how damn easy it was to pop the lock.
