I though that it was different. I started to re-read, found EPR paradox and Bell’s theorem and I’m sure about 1 thing: I prefer to focus on Elixir - high level physic theories are just too much for my stupid brain. 
Firstly the point is not to think that’s not possible with quantum entanglement, but to think that quantum entanglement exists/works as is. I mean that if such thing is possible then how much other (similar?) things are possible also?
Secondly quantum theories around entanglement are not yet 100% investigated - there are still debates about them. Lots of people are sure that speed of light is fastest, but “few years” ago we though that Pluto is planet as same as Earth or Mars …
Finally NOW we think that we can’t change data. It’s hard to change something which we do not fully understand. Nobody said that only “some magic power” can change them when we are not observing them. It’s definitely possible to change them “somehow”. The only matter is how fast we would find a way to do it and how hard it would be.
I watched some videos and people more or less seriously started to think if it would be possible then is quantum teleportation killing (in terms of law) original body or what if we would not destroy original body. Of course it’s only “what would happen if”, but look that already in history people are trying to create something which was described/seen somewhere (for example Star Trek was huge inspiration if I remember correctly).
It’s like “with current knowledge it’s not possible” rather than “we are sure that’s not possible”. It’s a true “magic” of science theories. 
Heh, probably one of last theories/things I forgot to say about and on that part you agree.
