Comment by tranq_cassowary

It doesn't make it more possible to irreversibly brick your phone. Even if you set it to the most strict setting the port still works when you are in the bootloader and recovery modes. See https://grapheneos.org/features#usb-c-port-and-pogo-pins-con...

Also, it isn't the only materials difference in that threat model. To just give on example, the autoreboot feature is also useful for that.