If a rocket never fails, it means it's too heavy (overdesigned.) That's why Musk is ok with failures early on - he wants that data.
So whether a destructive test is intentional or not, it does provide data for the next iteration.
It's irrelevant if somebody "plans" or "hopes" for a new rocket to work tomorrow. It either works, or doesn't.
If a rocket never fails, it means it's too heavy (overdesigned.) That's why Musk is ok with failures early on - he wants that data.
So whether a destructive test is intentional or not, it does provide data for the next iteration.
It's irrelevant if somebody "plans" or "hopes" for a new rocket to work tomorrow. It either works, or doesn't.