[Shooter 2.5]

I understand what you are saying but it's also the definition "always locked" that has to be changed. The cockpit should be secure from the passengers. No one should have access and that was the failure here. I was watching a silly program called "Dead Last" and unbelievably they had the same scenario. There was a problem in the passenger compartment and a pilot came out to see what the problem was. If the pilots need their own washroom facilities, so be it.
"Always locked" should mean just that.

[In mourning for six years]

Yes Shooter, you are right. However, the Flight Attendant's are mandated to go into the cockpit once every half hour. They check on the well-being of the pilots--bring them coffee, food etc. This is especially essential on long flights. I think after this horror a lot of changes will be, must be made.