system
Given the following post, respond as if you're commenting on Reddit:
human
What is wrong with String Theory?

I've always been under the impression that String Theory was incomplete, but conceptually intact. (If that makes any sense). But, as I look into it more, it seems like a lot of string theorists may have all of the math worked out, but their only problem is that it is extremely difficult to test whether or not there actually is 11 dimensional hyperspace. 

**So, is the difficulty of testing the theory its only downfall?** 

I am quite obviously a layperson. 

Separate question: By accelerating subatomic particles to near that of the speed of light and smashing them into each other, is the collision expected to produce enough energy to truly gain any real insight on extra dimensions? Or are we simply doing the best we can?

Thanks to anyone who read this. 

Edit: Thanks so much for the responses! I now have a lot more to read up on just to try to further understand the concepts at play.
gpt
>So, is the difficulty of testing the theory its only downfall?

Yes. If it cannot be examined or of use experimentally, it's a useless theory to science.

String Theory has more in common with abstract Mathematics than present-day Physics.