Either side of this particular issue is actually tenable; someone has to draw those lines, and it might be a good idea to have the courts as a backup in the case of gerrymandering. But Biden mischaracterized the living breathing hell out of what Alito's position was. Alito said that the courts should simply stay out of it, because an abusive court can be just as dangerous, if not more so, than an abusive legislature. I have been trying to learn Alito's actual view on the duplicate thread, but so far I haven't been able to figure it out. Could you be more specific as to why Alito would be against equal apportionment? Is there a case, or other writing that makes his view known?
That's the thing; he's not against equal apportionment. He's against the judiciary getting into the issue. District lines can be drawn by courts, or they can be drawn by legislatures. The Warren Court wanted the lines drawn by the courts; Alito disagrees and wants the lines drawn by the legislatures.
Biden is interpreting that to mean that Alito is against voter districts containing roughly the same number of people, because he (and the Warren court) thought that only courts are enlightened and fair-minded enough to actually do that.