Oh, puh-lease. He had a delegate? So what? Harris didn't have any delegates. You know why? Because she was the sitting Veep who didn't challenge her own President.I think you're just assuming your conclusion. Biden dropped out before the convention. Phillips had an elector at the convention. It was entirely feasible for the Dems to go to the convention and select the only guy still around who challenged Biden and told the truth about his ability to even do the job while Harris lied about it.
Listen to that interview. Phillips said that when he ran, a majority of his party in Congress agreed that Biden was too old, was in decline, and couldn't do the job for 5 years. (You can start at 4:36). I believe him. This wasn't just on Biden and it wasn't because everyone found out too late about Biden's decline--they knew and rolled the dice.
You're trying to make something out of nothing here. Phillips was never an option. Period.