You presume far too much Delta.
Your so called proof is simply an understanding limited by what we think we know. The beauty of any knowledge is that it can expand our understanding of something and in many cases it can destroy our preconceptions.
Science has not got all the answers .

If we start believing we have all the answers we stop asking questions , only by questioning everything will we ever truly grow and learn , take nothing for granted and never accept anything at face value.