This is simply not true... and even if it was, it would be disastrous to bitcoin long term considering all you have at that point is an exclusive club where the only persons who have access to the tools of the trade are those that had got into the mining market at ground level and have a hoard of bitcoin. Meanwhile these companies producing their mining products are reliant on third-party vendors to exchange their bitcoin to pay the vendors that only accept local currency for the raw material needed to make the finished products. This is NOT good for business.

This practice is just not tenable and you can see that in the moves that most of the major ASIC manufacturers are making towards including PayPal's shitty service into their payment options (ie. BFL, Terrahash, KNCMiner) because they know that people that weren't in the game before are already scared as it is moving into a highly volatile new currency let alone, the promise of generating it, and will need a comfortable entry point into the market in order to have any chance of growth.

Sure you can counter argue the use of Mt.Gox and other exchanges are there to serve as intermediaries but the reality is people are lazy, scared, and resistant to change... And the easier you make for them to enter into the market, the more sustainable the growth and confidence in it will be long term. The companies know/are learning this and is one of the best chances that Bitcoin has to succeed.