Never said anything of the sort.
It's a fact that true measurement microphones that measure flat--and have traceable certificates to prove it--do NOT employ DSP. They are expensive because it's actually quite difficult to get flat response 20-20k.
I'd just like to know how Dayton & MiniDSP do it for $39 & $79.
I assume they use cheap DSP chip to correct the major flaws, and supply a deviation sheet so the end user can correct the remaining error.
You two assume their mics are made of fairy dust and provide $1000 performance for $79.
I'm sorry but I'm a realist and suspect things aren't as simple as you assume.
Ultimately it doesn't matter to most. They're certainly more flat than most uncorrected rooms.
