Together with secure boot and your own signing keys, it could be a good way to en/decrypt the a dm-verity secured read-only rootfs. But for the home partition I would probably still want to enter my own decryption key, maybe via systemd-homed. From there you can update the kernel/initramfs and read-only rootfs image and sign them for the next boot.
This is complicated to set up. Otherwise maybe use TPM as a 2FA, so you still have to enter a pin?
The problem is EAs business model for this game. It is free to pay, so EA need to extract money otherwise. They introduce some gamified resource collection and crafting with exponentially rising costs, etc. And hope that gamers circumvent that by buying stuff with real money. Now players don’t all want or can’t do that, and look for alternative solutions.
So EAs business model drives people to cheat. To cheat them primarily and other players secondarily.
And because of their business model, they cannot solve the cheating between players by giving them dedicated servers or just let them P2P match, because they would loose control over them and their ability to extract more money.