Some of the things wrong:
If you go to PA to talk to a PA audience that is 2.5 hours away from Gettysburg... that would be like going to I dunno, Detroit to talk to people about Muskegon.
If you talk to a PA audience about Gettysburg maybe celebrate the fact that the Union was saved there.
Maybe not celebrate the confederate general who if he had only been better at his job might have been smarter about his disposition of forces.
And General Robert E. Lee was a confederate general and therefore a traitor. Of course he wouldn't be in favor.
Lee was not a leprechaun and didn't talk like he was worried about people stealing his gold.
He lost his great general? Not at Gettysburg he didn't. He might have meant Stonewall Jackson who died in May 1863.
Notable: Lee was never Bill or Ted from "Bill and Ted's Excellent Adventure" or a member of the Bluth family from "Arrested Development" and therefore did not say "Wow, that was a big mistake"
Also, Lee ordered Pickett's Charge and the assaults on Little Round Top and Culp's Hill so he definitely did want his troops to fight uphill.
Biden meanwhile just spent his Saturday night in the situation room of the White House coordinating with multiple allies and defeating an Iranian attack. He has been assembling coalitions in response to the threat to Taiwan and Russia's aggression in Ukraine. He may be older, but he's not a drooling adderal-sniffing idiot.