Incorrect. You can get that low with stock suspension.
My Cuda has stock type Hotchkis parts and has had completely stock parts I have run it at 23 1/2" from top of fender lip to ground with cast iron exhaust.
But currently it is set at 24" fender lip to ground for header clearance. The headers are your limit before the suspension. I drive my car a lot and go into parking lots with speed bumps or driveways that have a crown. Even right now it will scrap the header flanges slightly.