Why did he bow?
Silly and stupid question. Why does one shake hands in western cultures; why does one embrace in most latin cultures; why do Japanese people bow; why do Indians fold their hands and bow when greeting each other; why do most people who meet Royalty bow or courtesy?
These are all cultural HUMAN traditional greetings. Stop being ignorant for a change and accept that this is nothing burger, unless your anti-Catholic bigotry won’t allow you to do so.
Incidentally, our Lord not only embraced, bowed, kissed his disciples feet, but encouraged his followers to do the same.
Because his orders are to BESMIRCH his position as Pope.
Same as Bill Clinton did with the US presidency—
make it a laughingstock around the world.