One way of Biden not finishing his term is dying in office.
You pretend that not finishing his term and dying in office are two totally different things. They aren’t
The chances of Biden passing away in office are extremely low. He has literally the finest medical care available on the planet. People say “oh he won’t finish his term” as if it’s the simplest thing. But if your entire argument depends on him not finishing his first term, you can’t gloss over the fact that it’s extremely rare for a President to not finish a term.