AT&T/Verizon root workaround?

Okay so I'm theory is this, as the note 4 from Verizon and at&t come with locked encrypted bootloader.. I did some brainstorming and thought well what part of the hardware inside the phone actually has the OS and locked bootloader... my point is if it can be isolated down to the hardware that has these bull**** "protections" why not swap said hardware at a chop shop so to speak with other more root friendly hardware. If my theory is correct then we can still use the same phone without worrys of coverage from unlocked phones due to different bands and frequencies and worried if you made the right choice of unlocked note 4 ending up with out 4G LTE or other factors that may make it a bad choice.

I would like to add in this that I'm slightly tech savey and have a basic knowledge of hardware and programming. I'm by no means a 100% sure if this is possible, I'm limited in the details of just how this all works but from what I know the idea popped in my head and I thought I'd ask to see if maybe there is a chance that I can tinker and swap a motherboard or something to gain root access I've watched tear down and rebuilds of the note 4 so it doesn't look all thay hard. Anyways let me know what you think.