Biden has no ideology beyond really, really wanting to be president.
Yeah, hence why he ran in such open primaries as 2016, 2004, 2000, 1992, 1984, & 1976... oh wait.
I mean, running that many times at all for SURE boosts his assertion, haha.
I don't think you get it. The point is that he didn't run during any of those open primaries. Before this year, he only ran in '88 & '08. In contrast, if he truly "ha[d] no ideology beyond really, really wanting to be president," then he surely would've ran in some (if not all) of those open primaries in which he didn't stand.
It is important to note that Republican incumbents were generally considered big odds-on favorites in 1992 and 2004, and its a stretch to call 2000 and 2016 "open" primaries on the Democratic side. 1988 and 2008 were really the only open primaries where it was initially expected that Democrats would win the GE.
