"Why not just stop all research because it's "God's will"?" -Amaranth Rose

I am confused on the goal of a "theory of everything" Because if everything can be explained through a mathematical formula then is there "free will"? What is the point of researching anything if it is fruitless because of scientific predeterminism?

Does a "theory of everything" support the idea of predeterminism? Such to mean as everything we do or do not do matters not because it is mathematically predestined?

Sincerely,

"My God, it's full of stars!" -2010