The point he's making is that a QR-based flow that doesn't require downloading and installing an app, and instead uses the already-installed web browser, is even lower friction and can be used by ordinary folks just as well, if not better, thanks to having fewer friction points. Requiring an installed proprietary app to manage a physical device that would otherwise be manageable via a web interface is not a net improvement to the usability or accessibility of the product. Especially if it's something you set and forget, "normies" are not going to go back to that app for a very long time and likely will forget about it. Hard requiring app setup for a router is a play to sell usage and location data, it is not looking out for those that aren't "computer people".