Biden was involved in a single one-on-one debate during the primary... By the polls, he won that debate... He debated many times overall. And while some of those debates were reviewed poorly by voters, they apparently weren't so poor as to deny him the nomination.

People seem to forget Biden has been running for president for well over a year now... He doesn't get anywhere near the attention as Trump, but he's gotten plenty... And voters haven't hated it... In fact, he's got a clear lead after beating like 25 competitors in the primary.

Like sure, Biden could go up there and have a poor debate as rated by the voters. Anyone can. Even master orators like Obama had poor debates... but the expectations some are setting for Biden are so low that Muggsy Bogues could walk over them.