Yeah, we were told back in 2004 that Kerry was the most electable - and he lost. We were assured that Clinton was the most qualified person to ever run for president - a shoe in! And she lost.
Buttigieg and Harris are the John Kerry and Hilary Clinton of this cycle - the only ones almost destined to lose to Trump(you can swap out Buttigieg for O'Rourke, or Harris for Klobachar/Gillibrand).
Howard Dean would have beaten Bush. And Sanders would have beaten Trump. Sanders is the Democrat's best option to beat Trump. American voters have consistently rejected Neoliberals - to the point they elected Donald Trump over the latest Neoliberal incarnation.
We do not need to run another corporate approved free trader running to the Right of Trump on war, jobs, and trade. We can beat them by offering an actual alternative - and that has to be from the Left.
I'd love to see Tulsi and Yang crest into viability, but for now Bernie is the only Neoliberal alternative.