I work in the aviation industry (not aircrew) and it’s easy to say “they should have done this” “why didn’t they notice that” but in a very stressful situation your brain changes from what are normal thought patterns to something that seems normal to you but the reality is that you aren’t doing normal things.
You get tunnel vision very easily in a high stress situation, your choice in how to resolve the problem becomes the only thought process you can appear to be aware of and once you start down that path and add the stress into the situation it can become impossible to break from that and select another course of action.
I myself have done it and have seen colleagues do it. Afterwards the reaction is “why the f*ck did he/she/I do that” but at the time it seems the correct thing to do, or you brain has no other option available to it.
Shame that so many lives were lost and yes it shouldn’t have happened. But it is easy after the event to sit and look at the facts and blame those who can’t defend themselves.