From the article: "After new users sign up to a website or app, they are often dropped directly into a home screen. ... This is a big missed opportunity. This moment is a chance to ... ask important questions, and personalize their experience. ... They will then be more likely to tell their friends about you. When combined with analytics, the onboarding process presents an opportunity to learn vital details about your users ... and increase retention and conversions."

So this isn't for the user's benefit.