String Theory attempts to make two mutually exclusive theories (General Relativity and Quantum Mechanics) compatible.
It's silly. It's absurd.
It's probably a great way to obtain "research" grants.
Southack, your criticism is misguided. It is not "silly" or "absurd" to attempt to make General Relativity and Quantum Mechanics compatible theoretically, since the actual Universe appears to satisfy both of them! The only alternatives to trying to make them compatible are
1) try to prove experimentally that Quantum Mechanics is actually wrong
2) try to prove experimentally that General Relativity is actually wrong
3) give up on the notion that mathematically describable "laws of physics" exist
If you are a theoretical physicist, as opposed to an experimental physicist or a philosopher, those alternatives are not really sensible.