What happens is this. Someone makes a product with a 0.1% reliability.
This is a fallacy.
What happens is it'll be incredibly obvious in tests (which you can afford to do with cheap missiles) if the reliability rate is that low. Why would it be?
Everything about it screams these are a new cheap, almost worthless missile. Particularly the use of the word 'hypersonic' to describe a missile that the US would never call hypersonic (we reserve that word for advanced, hard to hit hypersonic cruise missiles, not hypersonic ballistic missiles that are easy to destroy)
Quantity has a quality all of its own.
Never mind that hypersonic is not a military term, but an aerodynamic regime. You (or pretentiously "we") don't get to reserve that word.
Mass manufacture of cheap propeller cruise missiles is enough to overwhelm the production capacity of expensive interceptor missiles. And hypersonic ballistic missiles aren't easy to intercept, they are possible to intercept. But, much harder than low speed missiles, so you need fewer to overwhelm the stocks of interceptors.