I didn't know the Stuka cost only manpower, required no teching, and was capable of being re-crewed once killed?
Much like "b-b-but Germans didn't use artillery" guy, do you seriously think rocket artillery=heavy artillery?
The Russians did with there vast array of Katushas with rockets ranging from 82mm to 300mm, on many platforms.
But I await the cherry-picking.
Also, not everything the OKW has needs to be some big sized weapon or something. Too many of them and it tends to get stupid.
I'm looking at you King tiger/Sturmtiger/Jagdtiger.
I also believe the 15 cm Nebelwerfer 41 is what they need.