I must be the stupid one because I don't understand most of what he wrote.

Fly an airline that customers love to even more places:
How many places does AA fly to that UA doesn't? Sure, there are some places in the Caribbean but how many more? Can't be many.

Create even more value:
Nothing is stopping UA from creating more value. More important, nothing is stopping their competitors from creating more value.

Create a truly globally competitive airline – based in the U.S.:
Excuse me... isn't UA already the largest global airline in terms of intercontinental travel? If you aren't "truly competitve" now, how is being even bigger going to matter? Maybe the problem lies elsewhere or is this just a move to neuter Oneworld?

Boost the U.S. economy, create millions of jobs and revitalize and strengthen the U.S. aircraft manufacturing industry:
That's Boeing's job, not UA's. If they can't solve their own issues then no one else can or will.

This whole thing about expecting a merger of this size would be approved is foolish at best and perhaps worse. Does Mr. Kirby not listen to the news? President Trump publicly stated months ago that he's in favor of airlines mergers but opposed to mega-mergers. How could that not be more clear?

Lastly:
We've seen an airline like this one being proposed before. By all accounts, Aeroflot should have totally dominated global aviation. For some reason (well, many) it didn't.