Well, why not? Julia is very different from Python, if I am willing to use a completely different tool then the field is wide open and includes anything that has better performance on average
Julia's mental programming model for many things is not much different from Python: dynamically typed, pass by sharing, the implicit scoping rules are even quite similar. Sure, Julia has a few extra bells and whistles, like type annotations and dynamic multiple dispatch (which you can ignore and you have something very much like Python but faster), but still, Fortran and C++ are much more different from Python than Julia is.