not really, the argument isn't about costing lower, but just by comparing the Vive to oculus, you can see clearly that valve is trying to make a cheaper product rather than trying luxury as rift did, controllers usualy cost from 5-10$ doubt Vive one would be different, and it's impact on the bundle would be less than 20-40$.
but why it could be cheaper is a different matter, as i mentioned valve is a platform like ps4 or xbone, they have over 130mil users, with an average of 10mil loged at the same time, so their motivation are a bit different from oculus.
like Marketing, valve have steam, oculus need to throw huge amount of money at it, because VR isn't like any simple product, they need to educate ppl on it.
valve make money on VR games sold on steam, oculus dont unless their studio developes it, or publish it.
there are many factors that makes VR cheaper for valve, more beneficial, and the cerise on top, their own steamOS and vulcan interest.
so technicaly if they want to sell it cheap they could, still too early to say though