There are benefits to native apps too. Being able to work offline and not having your every action and input spied on in real time is a big one. It's all a question of trade offs. Users who prefer privacy, lower-resource consumption, offline use and more familiar/native interfaces will probably not want a web app. Users who don't care about their privacy and want a program avilable to them anywhere and anytime they have an internet connection might want a web app.