Sounds like you ran into a couple of fanbois
with badges... not an uncommon situation, I'm sorry to tell you. There is nothing wrong with the cartridges they mentioned and the .40's powerband can cover anything from light 38. Special to low-end .357 and 45 ACP.
It is one a a very few government programs that actually resulted in something good.
The .40 S&W: Your Tax Dollars at Work!