Flight attendants on my last flight were joking with people in the exit row that during the pre flight check they are not actually locking the door, all they do

Flight attendants on my last flight were joking with people in the exit row that during the pre flight check they are not actually locking the door, all they do is engage/arm the slide. The main male flight attendant said “doors are already locked!” and I said - but are the bolts tight? Guys face went absolutely frozen for a second and then he chuckled and said “we’ll be fine”