Theory about the deaths of Infinity War ( Confirmed )

Joe Russo has confirmed the theory that Soul Gem is a new dimension class. In which all the people who are affected by it are housed. It means that none of the Avengers has died, they have only been taken to the dimension of this gem. They also asked him if Gamora was alive inside the gem of the soul and he affirmed with a yes, then the final scene of the vision of Thanos with Gamora as a child, happens inside the gem of the soul ...
This leaves us with only 3 permanent deaths, Heimdall, Loki and Vision 😭
What do you think about this theory? 🤔