It was genuine. He worked hard to get good at making beats, to the point he got signed at Roc-a-Fella Records to make beats for big artists at the time (Jay-Z, Alicia Keys, etc). He was super known for that in the industry, but Kanye insisted on one specific term of the contract - they gotta let him release his own album. Which they hesitantly allowed, because they thought he was just gonna fail and go back to what they thought he was good at, making beats for other rappers.

They didnt want him to be a rapper, but not for some malicious reason. They loved his beats, but thought no one would care for his songs that were nothing like the mainstream rap at the time, especially since none of them were about bling/drugs/gang stuff. That's just what was selling. And Roc-a-Fella Records wanted their star beatmaker actually making beats for their star rappers, not "pursue dreams". So they allowed him to make that album, thinking the sooner he is done with it, the sooner he will get back to beatmaking.

All of this is confirmed by tons of other people affiliated with Roc-a-Fella Records (like Jay-Z and others) at the time.