There's a reason Joe Biden is working so hard to change our election system.
He doesn't think he can win under the existing structure. In fact, he might very well KNOW that is the case. That's why he's spent at least the entirety of 2022 pushing for changes to our election system.
In 2020, Biden lost big in Iowa, the first state in the primary schedule. He did the same in New Hampshire and Nevada when they followed. It took him until South Carolina to have a strong showing and start catching up.
Instead of trying to do better in the first three states to start off with more momentum, Biden's just falling back on his old trick of trying to change the rules to suit his desires.
Who cares about the rest of the country? Biden needs momentum to start, so he wants to start in South Carolina.
He made this announcement under the guise of saying that voters of color need to be involved earlier in the election process, declaring:
As I said in February 2020, you cannot be the Democratic nominee and win a general election unless you have overwhelming support from voters of color — and that includes Black, Brown and Asian American & Pacific Islander voters.