THIS.
POTUS is setting the stage,notice how he says, "We must always be the leader in everything we do, especially when it comes to the very exciting world of technology!"
He's not advocating for 5G, he's advocating for total dominance. Would if there's something safer and more advanced than 5G that we don't know about or is classified? Would if it is conveniently revealed at the appropriate time? 5G would no longer be relevant would it?