Why did Biden use "Hail to the Chief" as a prelude to what was a hardcore political speech?

I'll post separately about the speech. I mean, I can sum it up in 7 words: We the People, but not you people. 

But first, I want to talk about the use of "Hail to the Chief," which struck me as a violation of protocol. Was that inspired by Nancy Pelosi? Here she is on August 13th:

 

Biden used to have a self-effacing attitude about "Hail to the Chief." At a CNN town hall in July 2021, he said the first time it was played for him, "I went, 'Where is he?' It’s a great tune but you feel a little self-conscious."

That was last year. Now, he and/or his people have decided to forefront the grandiose tune. Why?

The tune, Wikipedia tells us, was originally the musical setting to some lines from Sir Walter Scott's "Lady of the Lake." A character named Roderick Dhu arrived by boat and was hailed as "the evergreen pine" — "Heaven send it happy dew/Earth lend it sap anew."

After the tune was adopted — in the early 1800s — to honor American Presidents, the lyrics after "Hail to the Chief" were rewritten, but who remembers those other words? When I hear the tune, I think "Hail to the Chief da da da da da da da da da da." 

Maybe when you hear the song you think of "Fortunate Son," the 1969 Creedence Clearwater song:

Some folks are born made to wave the flag
Ooh, they're red, white and blue
And when the band plays "Hail to the Chief"
Ooh, they point the cannon at you, Lord

It's up to the individual President to decide how to use "Hail to the Chief." So there was no violation of protocol last night. I only experienced my own sense of tradition.

Imagine if Trump had entered his political rallies with "Hail to the Chief" instead of "God Bless the U.S.A." To assist you in your imagination, I'll quote what one English professor, Joseph Rezek, said in March 2017:

There’s a through-line connecting ‘Hail to the Chief’ and the Scottish character at the beginning of it all and Trump that I find totally disturbing... What strikes me... about the analogy with Trump, though, is that Dhu commands absolute loyalty in the feudal way. You have to pledge allegiance. Hail to the Chief—that phrase is about the kind of loyalty you have to show. Trump’s insistence upon such loyalty is the same thing. That can make a seemingly innocuous moment, when the song is played for him, seem a bit darker.

And when it's played for Biden, does it make the moment darker? It was nighttime, and the backdrop — Independence Hall — was lit in deep red. The rhetoric was demonizing the enemy, the American enemy among us, the people who are not "normal," not "mainstream." And our "soul" is at stake.