Does non-moneymaking info sell on the internet

Okay. There are a boatload of internet marketing 'gurus' out there that all promise to show you how to: find a hot target market, research a product, create a product, create traffic, write sales letters, build a list, etc.

All of these guru's have a product that teaches how to market on the internet (or some aspect related to that.)

Then you see the testimonials on the sales letter on their website. The people that praise their products are mostly ALSO selling how to information on internet marketing.

Is there anyone out there buying this information, and then selling information that is NOT about "how to make money on the internet" or "how to make money"?

Are there any markets out there that are profitable enough to create for that do NOT involve showing others how to make money?

What are some examples of people that are selling successful information products that are NOT about making money?

It seems to me that there are way too many people out there teaching others how to make money. This leads to more people that "teach" others how to make money through the sale of their own info-product. Soon, the only people making money are the ones teaching about making money.

Am I right or wrong about this?