I'll agree with some of this, however that the Big Bang happened and it looks like Inflation occurred doesn't really mean anything other than it happened once. Spacetime expanded into more or less nothing, but now this would not be the case. Can't happen? Not saying that, but some others are really reaching for something they desperately want, and that becomes something other than science. By all means do the work, but people need to stop drawing false analogies. The history of physics is that a phenomenon is observed and eventually theories and laws explain processes. If further study shows inconsistencies then refinements or new theories come into play. From Newton to Maxwell to Einstein. Boltzmann, de Broglie, Heisenberg, Pauli, Schroedinger and who knows how many others advanced science not by insisting that something exists out of agenda, but because something wasn't quite right or could not be fully explained. In the case of FTL travel we haven't anything like the photoelectric effect or quanta or unaccountable spectral bands. No cracks in the scientific foundation as it were. Does it make what you hope for impossible? No, that's not for me to say as I haven't enough information or expertise, however others appealing to the "if it isn't forbidden it must be". That's religion, not science. The universe is not compelled to obey our whims.