You can read the full statement in the link above, but this reads as a desire to cut down on the financial strain of legal work. As an extra wrinkle, Paizo says: "We offered a marketing agreement to [Archives of Nethys to] make the change less impactful, but those conversations were not concluded before they chose to publish their notice."
Original story: Pathfinder 2e's developer, Paizo, gets a lot of slack from me—because all told, Paizo is incredibly generous. As a system, PF2e costs basically nothing to play. Every rule, additional class, extra monster, etcetera is available online for free, either through platforms like Demiplane or via its very good Foundry integration.