When I first read your ask, it really made me angry. I have a special place in my heart for Louis, so I do get a bit defensive of him, so I put this away for later. I read it a second time, and yep, still angry, so I waited still. Luckily for you, Anon, on my third reading, I am only rather pissed, so I should be able to keep the snark to a minimum.
If I was at home, I would search and post three years of photographic evidence. But since I am not, this shall be relatively brief. Look at his fucking eyes!! Not just at the airport, but at the “Class of ‘92” premier as well. Louis has not smiled with his eyes in more than a year. In the ‘92 video his movements were light and free, his entire face was animated and smiling, and his eyes radiated joy. It is the same in the airport pics. His body looks entirely relaxed (rather amazing considering he just got off a transatlantic flight!), and his eyes are joyful. He was happy to be there - something I have not seen from Louis in a long, long time. He did not look weary or forced.
Now we can debate the reasons for his happiness until the murdering cows come home; but don’t you dare try to diminish the fact that Louis finally looks happy again.