Some one mentioned something similar about their Ford Lightning in a previous thread. If a whole truck with batteries cost less than the same bare batteries then people buying powerwalls are getting absolutely screwed.
Regardless, the thing that’s really great for cost effectiveness is that the same large battery can be used everyday for driving and also used rarely for emergency home backup systems.
10% to pay for their costs - materials and labour
90% to pay for their new Cybertruck financing