That's because Trumpism is a cult and Biden's supporters are run of the mill mainstream Dems who are not enamored of him like Trumpers. They will loyally follow and vote next time for whatever neoliberal corporatist hack the Dems nominate next time, but they won't be in love with him like Trump's followers are. To his supporters, Biden is just another pol.
I know, the Dems pic the least charismatic likeable person and he won because we had to end the shit storm and devastation and lunacy of the last 4 years.
Depending on where you live, that would take real courage.
Where do you live?
The Trump zombies are afoot in the land; are you SURE?
THE SECOND CIVIL WAR IS DRAWING NIGH!
The zombies think we're pushovers.
I live in a rapidly expanding blue island in a red state (Dallas, TX). I remember one of the militia guys telling me that the army would welcome them if we were invaded. I had to laugh, the first rule of the military is to follow orders, and these yahoos couldn't even hunt clay pigeons by the rules.
"Just remember ta hit em in the head. They go down real easy if ya hit em in the head. N burn em afterwards"--Sheriff in 'Night of the Living Dead'.