QuoteAre you saying without actually seeing particle A you can't read particle B's state?
yep though to be fair a lot of people think entanglement makes FTL communication possible as the physics explaining why this measurement is needed is a little dense (meaning physicists don't talk about it much to the public).
NB: quantum computers could be made but the only ones the've made are quantum annealers like a hybrid ask them the right question and there ain't a classical computer out there that could beat them.
Also you'll probably be able to tell when a true quantum computer is made as banks will probably freak out due to there encryption being rendered completely useless