There is a lot of truth in what you are saying.
I have followed dozens of Internet marketing gurus over the past 10 years and still receive daily newsletters from most of them. I can say without any reservation that in my opinion every one has been a fraud or is misrepresenting themselves, their accomplishments and their offerings just to sell themselves as a product. However, what you get is more often than not just an empty shell.
In all honesty, there is only one Internet marketing guru that I believe has a good business model that is worth emulating, because there isn't any hype, braggadocio or BS behind it. This guy does not even tout himself as an Internet marketing guru, yet his accomplishments with respect to his web businesses are obvious.
I met this guy around 2005 when he was just really starting to get rolling and have followed his exploits ever since then. Who is he? This is not a big secret. It is Will Spencer, who sponsors this forum.
Listen to Will's opinions. They are based upon real experience, not grandiose claims. You can take those ideas to the bank and it will not cost you anything.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin