Concentration naturally builds in competitive markets. As each competitor is slain, you get the stuff they owned and add to your power. Nothing stops it except pressure from below. Allowing one man to own huge swaths of our cultural heritage is absolutely mind boggling insane, like a feudal king dictating what culture the peasants are allowed to have.
Its not a physical object. Songs are not going to be locked in some room and taken from society. Its just investment from his side and that seems totally OK in my book