Even if it was just one bad night, and even if anyone believes the hilarious notion that it had never happened before (in spite of George Clooney saying 'fund raiser' Biden and 'debate' Biden were the same) or that it would never happen again, once is enough to disqualify him for being POTUS.
12/29/19: the US embassy in Iraq is attacked. Trump is up and dealing with the situation. Order #1? We're not going to lose the embassy. I can't imagine Joe being up in the middle of the night to deal with that, nor being clear headed enough to issue order #1.
What if he was having another one of his 'just one bad nights'?
Those with service members in their family have to be living in fear that something will happen involving their loved one outside of BST (aka Bribe-em Standard Time, aka 10AM - 4PM eastern), because it put their loved one's life at risk.
And btw, none of the service members who died in Jordan and Afghanistan on Biden's watch, died on BST. So even if Joe had been able to save them, he was busy getting his beauty sleep.