By all means, but then are assuming that your suppliers are a threat? Did you check every chip on the motherboard that comes im, verify the firmware and bios on all components, including firmware of webcams and SSD's? Who inspected source code of evrry driver? Did you vet every employee and what did you do about Intel Management engine?

All these measures are not feasible unless you are working in national security or a Megacorp, and insisting on one of them, while ignoring others, is daft