There's more to being educated than understanding how neutrons work, and you're proving this in spades.
Very nice.
Education is rooted in facts and research. So before debating on what the law does and does not allow the President to do, you should probably know what the law actually says and then have some examples on how it has been enforced by the executive branch and interpreted by the judicial branch.
The only thing that people are proving in this thread is that they can't be
bothered to use google and don't understand the fundamental role of the President. Instead they want to make up fictitious scenarios that don't even have the same logical structure as the original problem.
The majority of the President's fundamental domestic powers come from two basic functions: the ability to appoint government officials (including military), and the ability to say no to things.
You are welcome to peruse the link and find in Title 14 where it gives the President the power to spot appoint a licensed pilot and/or some case law to support your argument. If you can, then he has this power. If you can't, then he doesn't. Taken a step further, he has the ability to appoint a newly minted 1390 up to the rank of O-3, but he can't force him to immediately be allowed to fly where he'd be a threat to public safety.
Now, he can decide to order a CO to spot promote someone to O-3 and let him fly anyway, and that CO can refuse the order on the grounds that it's illegal, and this will turn into a long drawn out process that requires Congressional involvement where the CO is going to lose his job in the short-term and ultimately better be sure he's right. And we both know that the CO and the office of the President have real live lawyers available to them who actually know the law and previous cases to give them advice on the legality of this whole thing, so the idea that a CO has to unilaterally decide whether an order is legal also isn't grounded in how things actually work.
The President doesn't have unbridled arbitrary power over all things government, nor should he. A bunch of smart people decided this on Jun 21, 1888. But he does have the specific ability to pardon people, and he does have the ability to stop government officials under him who attempt to undermine that pardon by pursuing further administrative action.
It should tell you a lot that the Democrats, who have spent the last 3 years tilting at windmills to indict the President on charges of conspiring with foreign governments, have not stepped in here.