Even Obama said Biden shouldn't run in 2020, but when it seemed like Bernie Sanders would win, he put in the calls to get other candidates to drop and support Biden, who became the democrats' only hope.
Voting for Biden or any Democrat is like voting for a car salesman. They're there to sell you corporate bullshit. Voting for Trump or any republican is like voting for a used car salesman. They're trying to sell you old non working pieces of crap or shitty russian knock offs.