Ha...there you go, assuming that today’s science is correct. What if much of what you are saying is eventually proven wrong? That is what makes Science so much fun...
Well, that would change everything, of course! It could even change human nature!
But seriously, the observations of rest mass and increasing mass due to obtaining relativistic velocity are nearly perfectly reliable observations. Just like the bill for electricity from running the LHC is going to be "correct" with sufficient precision - they know how much energy is being pumped in, etc.