On the face of it, that research disagrees with you. Of course this is always the issue with much of humanity: "my opinion disagrees with the peer reviewed research, therefore the research must be wrong".
In reality, any evidence about it is probably anecdotal. That particular research just divides aviation degrees from everything else. Possibly research comparing STEM and non-STEM degrees would give a different answers. Or possibly not.
But frankly, I think that if you believe that a high level of understanding of incompressible aerodynamics will significantly aid you as a professional pilot, you could just be wrong. It's a pretty tiny part of the broader field we call aeronautics. That you are good at maths is probably much more significant.