I suppose it comes down to how the "financial maths" is taught. If it thoroughly covers the foundations, giving somebody the tools they need to build new models upon them, I agree. But if it's like "engineering maths", just teaching formulas and models without building a deep understanding of the foundations, then to me that's counterproductive, giving people tools they can't really use but not the ability to build better tools. Maybe I'm just biased however from seeing the results of assigning moderately maths-heavy problems to potentially unrepresentative samples of interns with finance degrees.