Arguing that you can't disprove something is not a valid argument for believing in something.
The most prominent atheist such as Richard Dawkins or Sam Harris will not say there is not god but rather that the odds of a god existing are incredibly low and therefore they recommend acting as if there were no god.
Also many of the people forget that proving the existence of god is different to proving the existence of a specific god such as the Christian or Jewish god. The theist who claim one specific god's existence are easy to disprove as there are so many of them contradicting things that science can prove today and the religious debate is a constant flow of science discovering a contradiction and religions either denying the truth or adapting there religions around it.
Science does not have all the answers right now, but let's not make up our own and play them off as truth please.
This is the Game of Thrones
Where you either win
or you DIE
