Because apathy will surely teach them a lesson.
It's less a case of apathy, than a statement of fact regarding the average consumers mindset - many of whom will never, ever read the thousands of posts on numerous websites concerning the matter.
You actually believe that a few outcries from a group of people (many of whom would never entertain owning an Nvidia product regardless of the issue or not) and whom represent a miniscule percentage of the consumer buying base, somehow wield enough power to cause a paradigm shift in OEM/ODM and consumer buying trends?
Were Nvidia and AMD taught any lesson when the colluded to price fix discrete graphics? When was the last price war since the judgement? How many people speak out against the two companies strategy of dovetailing prices and actually boycott both vendors products? How many people said "fuck this shit, I'm boycotting both these companies and buying a S3 Chrome" (obviously no one since the whole division went to HTC, with SiS/XGI and Matrox faring no better)
Were Intel taught a lesson after litigating Cyrix and C&T out of existence and keeping their foot on AMD's throat ? How many flocked to Motorola based products? (Record revenues year after year says not a lot)
Were AMD taught a lesson after they were caught cheating on benchmarks with fictitious processors and hobbling Intel numbers using out of date software results? How many boycotted AMD as a result? (Answer: Not a lot. Many defended AMD because of the "underdog" status. Win at all cost is acceptable if you're starting with a big enough handicap)
Were Samsung, Toshiba, and LG taught a lesson when they paid settlement after settlement for their part in seven years of LCD price fixing? Where was the outcry, and why is it never mentioned when any of these companies launch new product?
I think we can all agree that anti-trust, patent warfare, and widespread price fixing are more injurious to the consumer that the technical specification of a single SKU, yet none of these previous egregious (and more wide ranging) instances -any many more besides, met with anything other than a metaphorical shrug of the consumers shoulders in the greater scheme.
Consumers ain't care even if a significant proportion are aware of the issue - which is very seldom the case even when it makes the mainstream news including international TV coverage. Fewer still allow morality to intrude upon their quest for the next newest widget....if it did most. if not all the offending companies I mentioned above would have been blown into the weeds by consumer buying power.