What is Argument from Incredulity?
Assuming something cannot be true because you cannot understand how it would be possible.
Dismissing concepts or opportunities because you do not understand them is a surefire way to stay basic. Beware the double-edged sword of following advice that sounds too good to be true, but recognize and focus on deconstructing a claim to independently weigh its validity.
Instead of trying to figure out the mechanics of being a millionaire blogger, this claim generalizes the blogging industry.
Making an assessment based on ones own experience can go too far if other potential methods are completely disregarded.