"Still going nowhere" based on your binary mind view of things. Out in the real world though it is more complex than that.
It is not just about whether he wins or loses the presidency. He is going to lose, duh.
But to have a real-live democrat running around out there saying the quiet parts about Biden out loud- at a time when his polls are in the toilet- is problematic. Maybe it is only problematic by a few points but Joe (and all candidates) need to worry about "a few points" in the end. Every election is tighter than a bull's arse at fly-swatting time these days, seemingly.
The dems successfully drove RFK out of the party - but now another mushroom crops up. Probably with fewer quirks. Again, he is headed nowhere as far as winning anything. But - he is a big shot of in-house toxicity for the dems. Just as Bobby was.
Just putting him on the primary ballot gives a landing spot for Biden protest votes- which will have a nasty look to it.