I think you're right, and the article's claim that the drivers' ignorance is being taken advantage of is an unpleasant thing to say. It assumes that the drivers

I think you're right, and the article's claim that the drivers' ignorance is being taken advantage of is an unpleasant thing to say. It assumes that the drivers are financially naive, when in fact there are many legitimate reasons why they choose to drive. Many of them are supplementing their income in between other gigs, or enjoy driving more than other jobs available to them. Others have done well out of the referral, bonus schemes and tips that the author mentions. There are various other factors and incentives which the author does not seem to have taken into account. Much as I dislike the corporate practices of Uber, implying that the drivers are miscalculating the cost of driving and are therefore ignorant is a smug overgeneralisation.