You can rationalize that any President's trip to ANYWHERE is a P.R. piece.

I mean of course it's intended to be a public and symbolic event.

If the President, any president, from George Washington forward, didn't do public appearances, what kind of a public leader would he be?
His job is to act symbolically and lead the nation.

And for him to land on exactly the same airfield where a U.S. military helicopter was blown out of the sky just 10 days prior, is a bit more courageous that "just a piece of P.R.".

But hey, believe what you want.