Every time I see his name I’m reminded of his interview where he said that when the stock market crashed in 1929, FDR went on television to console the public (or something like that).
https://www.youtube.com/watch?v=ggCBSAzm23A
That is not ignorance. That is stupidity. He should know this kind of stuff by osmosis by now. It appears that during his entire career his aides have been doing all the work.
Having worked alongside the military for twenty years I can tell you I've seen the same phenomenon with some (thankfully not to many) officers. Their NCOs, civilian employees and contractors do all the lifting, while they take the credit without having done anything to earn it.
Probably most politicians are as ignorant as Biden and look good only if they have a capable staff. I am reminded of Senator Montoya in the Sam Ervin Watergate hearings in 1973--he read questions prepared by his staff and would read the next question without realizing the witness had already answered that in replying to an earlier question.