Disney+ doesn't just get all its content "for free" even though Disney owns it all.
A company as big as Disney has to be able to look at its different subsidiaries and analyse how they're performing individually. So maybe Walt Disney Animation Studio spends money making movies and earns money selling the rights to those movies, and so Disney+ gets exclusive access to streaming rights, but it still has to pay for them.
A company as big as Disney has to be able to look at its different subsidiaries and analyse how they're performing individually. So maybe Walt Disney Animation Studio spends money making movies and earns money selling the rights to those movies, and so Disney+ gets exclusive access to streaming rights, but it still has to pay for them.