You really think if all of these is happening and you'd have no idea what's going on? And of course, for the first time flyers, it's still a good idea to listen

You really think if all of these is happening and you'd have no idea what's going on? And of course, for the first time flyers, it's still a good idea to listen to what they are talking about (they'd anyway do it). But those who are flying almost everyday, the instructions are not changing regularly. Who listens to them anyway on a regular basis?