Hardware backdoors : OpSec | Torhoo darknet markets

People don't talk much about this topic, modern hardware has backdoors. They have full control in the system. Intel me and amd psp. Lot of efforts are unnecessary when they have complete control. Imagine that you have a home, you would buy a strong expensive door to protect from thieves, but windows are open. The thief would like to enter through the windows rather than via the door, right? This logic also applies to modern opsec. Why try to break encryption with expensive tools when you can use the backdoor. It is unreasonable to run hardened gnu/linux without libreboot IMO.
What do you think about this topic? Please share your thoughts.