From the way he tells it, there was no "Aha! I must sell books on the internet because books are my passion!" moment. Instead, he went methodologically looking for something to sell online, and books had widespread appeal, were easy to ship, and lent themselves to being searched on a website.
And one product that was not well represented on the Internet. This made books & publishing ripe for disruption.
> One day that spring, Jeffrey Bezos observed that Internet usage was increasing by 2,300 percent a year. He saw an opportunity for a new sphere of business, and immediately began considering the possibilities.
> In typically methodical fashion, Bezos reviewed the top 20 mail order businesses, and asked himself which could be conducted more efficiently over the Internet than by traditional means.[1]
Idea: Build a better mail-order business using the Internet. He saw the potential for the efficiency of the Internet and automation to make mail-order businesses obsolete. He didn't look at the Internet and say, "gee, I want to be an entrepreneur, what company can I start here?"
By your own quoting, he did exactly that. Maybe rephrased slightly, so as to frame "I wanna be an entrepreneur" as "I saw an opportunity", et c.
The point is, Bezos wasn't suddenly awestruck with the epiphany that the Internet was going to change selling books, which incidentally was one of his great passions.