I feel you are both correct. The problem is not really with the latches, they do lock once closed. If left open, the fact is perfectly obvious provided you look at them. BTW, there never was need to get wet, that idea only came up in the post "BA situation" face-saving excercise.
YES, People just need to do what they are paid for. NO, preventing a reocurrence is not going to be that easy.
The only difference with CFMs is that when left unlocked it is hard not to notice.