Biden is a very special case.
He is both stupid and lazy but he is also narcissistic egomaniac who thinks himself a genius so he always ego driven to be the big guy calling the shots . He is the Dunning Kruger effect personified.
He is also a very weird and degenerate guy who has an exhibitionist streak he loves to display to the public to taunt, humiliate and display his power and dominance over people with highly sick , perverse and inappropriate behavior
Well with Biden his wife is drunk with power as she is pulling his strings...Obama on the other hand is another matter as there is a specific reason he bought a house in Washington DC as every single former President got the heck out of DC...He wanted to be close to the power structure to pull the strings.
He puts the “fun” in dysfunction.