I don't remember the source or methodology for that number, but I have no trouble believing it. An app gives the developer a foothold on the user's device. It can more easily send notifications, track the user's location, resist customization like ad blocking, and remain present on the user's device even when closed. It's easier to funnel users into profitable behavior with an app.
Companies wouldn't do this if a large fraction of users refused the app, but most users don't.