Ya.
Just a light bulp moment while trying to figure out why FSD hardware is in cars that didn't even order them. Eventually FSD will be offered as a monthly subscription. Even those who didn't order FSD will find it convenient to order it for a few months on roadtrips etc.
The hardware of which you speak is the four side cameras (which also provide blind spot detection). Radar and computer are needed for FCW, AEB, and TACC. Rear camera is a vehicle requirement. Sentry mode also relies on the sensor suite so removing them really hurts the feature set for very little cost savings. Further, by including the HW, Tesla can upgrade trade ins and/ or get orders for upgrade after the initial sale (versus need to modify the car).
It will be awesome to someday see headlines about Tesla enabling FSD for car fleeing natural disasters to increase safety and rate of evacuation.