@Suiseiseki Decent phones have far better security than laptop/desktop class hardware which is also closed source hardware and firmware, but with far worse hardware, firmware and software security. Providing good security depends on hardware-based security features so those aren't separate things.
Pinephones have a huge amount of proprietary firmware running on the hardware. They have proprietary firmware for Wi-Fi, Bluetooth, cellular, the SSD, the main SSD and other components. You're wrong.