Yeah, they all knew the truth. She was bombed all the time.
It’s notable that Hillary herself has been making Freudian-guilt references to heavy drinking after the election to win cheap laughs.
The reality is that she was abandoned in very public fashion by her husband and is virtually friendless except for campaign toadies. She long ago turned to alcohol as a companion. Her physical health is poor because she’s heavy and menopausal but the drinking is what kept her hidden from view for days and weeks at a time despite the urgency of the campaign.