You definitely still want locks because most people have no idea how to pick a lock and a lot of crime is crimes of opportunity. But I don’t think there’s that much of a difference in most locks. A slightly better lock might dissuade a thief who learned how to pick cheap masterlocks, but someone who truly wants to get in doesn’t even need to pick a lock. I’d hazard a guess that break-ins happen far more often by breaking the window than picking locks.