Ahh for the good ole open door policy of days od yore.
Yes, I am very glad this rubbish was not in for all the decades I was in the Industry, would have made for some incredibly long and boring flights.
Also I feel so sorry for kids today, back in 70s and 80s when our kids were young, every flight we did, and there were heaps, the kids always got to go up to the cockpit for a visit, something our grandkids now will never get to experience.