One obstacle might be that by entering the VR, you'd be ceding a lot of control to the people "outside" your reality--they might gain physical advantage over you or hack your VR.
But if that concern could be definitively answered--and I think it could--then quite possibly the VR is a good move. Maybe any preference for our outside, non-simulative reality will in time be seen as narrow-minded chauvinism.
The main obstacle for me seems to be that by entering the VR, you're actually getting your chances to reproduce down to exactly zero. By the way, a good book on this subject is "the machine stops" from the early 1900s...
If that is a priority, you can reproduce manifoldly inside the VR. Why disprefer those children? It's possible to make the simulation run as long in subjective time as the outside universe.
But if that concern could be definitively answered--and I think it could--then quite possibly the VR is a good move. Maybe any preference for our outside, non-simulative reality will in time be seen as narrow-minded chauvinism.