String Theory is attractive to many physicists mainly because gravity emerges from it as something inevitable and not a forced feature that has to be cramped in unsuccessfuly as in other attempts which try to mary QM and GR. This is the reason physicists pursue strings despite the fact that experimental data is more or less impossible to obtain at our current state of technology. I'm not familiar with the "we are simulated" or the Simulation Theory enough for that matter, what scientifically attractive features do these offer or at least what indirect signs they are giving us that theyre worth pursuing?
PS. Elon Musk saying in an interview that „we just gotta live in a simulation, no question about it” doesn’t exactly do it for me