Well they have to make a profit somewhere. It's questionable they spent any kind of real money in cables. Especially when they're detectable and most likely replaced by the customers.
Doesn't matter. I changed mine out as soon as I got it. No wait - I had my cable waiting on the headphones to get here. Now trying to decide on Hard wiring or not. Very venturous.
If you buy a high in bicycle... you'll find it usually doesn't have pedals on it. No point in putting whatever on there says the manufacturer. Serious cyclists are just going to replace them with their favored type anyhow. Many high end products omit quality components, because enthusiasts replace what's replaceable almost immediately.