If you had sold billions of dollars worth of chips and a year later discovered they ALL have a problem, would you have tried to implement a fix (Fan speed), or admit they are wrong and lose BILLIONS of dollars + trust from millions of shareholders?
You'd try to contain the situation as much as you can. Anyone would. Hence the company would.
It sucks, but welcome to the real world. And you can't blame em as you'd have done the same. Pot calling the kettle black..
I presume this is targeted at me? Are you delusional? You decide for me how I'd react in this situation and thus based on clearly what you would do, you accuse me of being a hypocrit. The ONLY thing I was saying was that Dell were not at fault for adhering to Nvidia design specs, if Nvidia later on say "we've made a faulty product, upping the fan speed may prevent some dying", doesn't make it's Dell's fault. This was the only argument I made, I said NOTHING about if Nvidia implementing a fan fix was the right or wrong decision so frankly, don't make crap up.
As for the rest of your post, you are utterly and completely wrong.
The very way you maintain trust is being honest and NOT lying. You know what AMD did when they had a fault, they took the PR hit and went public straight away, this MAINTAINED trust in the company because people knew that even if it hurt AMD, AMD would be honest about faulty products. Nvidia flat out lied and tried to cover up their problems, and were caught, they lost trust directly because they tried to cover it up.
Intel have had more than one product recall due to a fault and both times they admitted this and recalled the products, they did not issue attempted fixes secretly. They took the PR hit and in doing so gained more trust not lost it. Customers prefer being told of a problem and having it fixed, this would apparently surprise you but a customer who is lied to then cheated out of money generally doesn't gain trust in a company.
Xbox RROD, MS gained a huge amount of hate as they tried to ignore the issue, and they gained back a huge amount of support when they upped and replaced all the RROD boxes. They gained back trust they had lost, they took a huge one time hit but made a statement of "if we make a faulty product, we'll make it right, we're sorry".
Nvidia made the statement of "if we make a faulty product, we'll absolutely do our best to see you not get a replacement, we'll fight everyone to pay out as little as possible, it will take class action lawsuits to get us to pay up for selling you a faulty product"..... but you believe this inspires trust, lol.
The industry as a whole entirely and utterly disagrees with you. When companies lie and attempt to cheat their customers, their customers lose trust, when companies make a screw up, own up and rectify it, they gain trust. There are basically hundreds of examples of companies in wide ranging industries, the ones who tend to lie and cheat through a problem generally do worse. Not always, a product recall can be bad enough that it can bankrupt a company and that has happened, but a company that lies about such problems can also end up bankrupt, but are also more likely to face charges, and more likely to have problems with employment in the future.