You implied that it is somehow advantageous to have another degree if you want to work in aerospace engineering based on the fact that there are more of those other degrees in aerospace companies than there are of aerospace engineering degrees, and that assertion is simply false. Does aerospace engineering have its pitfalls? Yes. This is not one of them.
My core point was that there are fewer aerospace engineering graduates, so it should be no surprise that there are fewer aerospace engineers working at these companies. You have done nothing to change that fact. In the broader job market, “computer people” are certainly more in demand because they apply to many more industries. In the aerospace industry, this is simply not true. There is plenty of demand for both “computer people” and for aerospace engineers based on the number of available graduates.
Further, the “computational engineering” jobs described in this thread have historically been filled by the more traditional engineers in their respective industries, not computer scientists, and “computational engineering” historically has not been its own degree. It is foolhardy to believe that people with aerospace and mechanical engineering degrees won’t continue to fill these sorts of jobs. You need a lot of engineers to design a modern aircraft or rocket, and most of them are doing their tasks largely computationally. Most of those jobs are filled by people with traditional engineering degrees.
Like I said earlier, aerospace engineers aren’t sitting on the sidelines in large numbers watching mechanical engineers and electrical engineers and “computational engineers” take their jobs. Implying that they are is divorced from reality.
EDIT: Just to clarify, I am not trying to imply that “computational engineering” is useless, either. In fact, there is certainly value in a program that digs deeply into the numerical methods and algorithms that underpin modern computational fluid dynamics and finite element analysis and similar applications, and these skills can translate to a broad range of engineering and scientific problems.