Changing the supply cap is theoretically easier than shutting Bitcoin down, but both involve making thousands of people distributed around the world adopt new rules at the same time which is practically impossible. At least for supply cap it could be agreed to over time whereas a shutdown needs to be coordinated simultaneously. People outside of Bitcoin don’t understand the power of this decentralisation and how impotent it makes even the most tyrannical government or insidious cantillionaire who are used to brute forcing people to their whims.