It seems that physics is increasingly becoming more mathematical. Would you say that an average mind without any talents in maths or physics but would like to understand the frontiers of physics (more specifically any GUT related theories) although not necessary contriubte to physics would be better off becoming a mathematician? This occured to me because a professor theoretical particle physicist at my university said he found it hard to understand the second part of "A First Course in String Theory" by Zwiebach, Barton (2004). He also admitted another time while lecturing that his knowledge of maths isn't large. And that he wished he had the time to look into it more. So obviously he is doing research in less maths intensive fields of theoretical particle physics. Obviously it would be best to be a physicist working directly on the GUT but lets assume that dosen't happen.