I’d agree with that, though I must say, the Thompson IS a pretty cool weapon!
If made with an aluminum receiver and plastic furniture, it is more useful since it can be brought from eleven pounds down to less than seven pounds. When built that way it is a useful home defense weapon. Hi-Point makes a .45 carbine that needs only a hi cap mag to be an equal in performance, though the design doesn’t hold up to more than 3000 rounds fired in its life cycle because of the zinc used in it.