There are better solutions
There are already modular house construction designs where the materials shipping container is used in the construction of the house - but unlike the standard shipping container discussed herein, this other housing shipping container concept doesn't limit the house design because of it's manufactured dimensions. Instead the walls of the container are removable at site and can be incorporated in the house design in such a way that it doesn't limit shape or most dimensions of the house. Changing standard shipping container designs to allow wall relocation would rapidly solve the problem container build up around high import ports.