Not only can you increase the font size, but Safari has an immersive "reader mode" where you can change the font and color scheme, and even have Safari dictate the page to you. A massive percentage of organizations that develop native iOS apps do so because:
* Users have been indoctrinated by years of marketing (e.g. the "there's an app for that" ads).
* Safari hides the "add to home screen button" deep within the share menu, and home screen real estate is incredibly valuable. Native apps have the advantage of Smart Banners [1].
* For several years Webkit didn't support notifications, and as much as I hate annoying notifications, it's undoubtably useful from a business perspective to be able to ping users and remind them to use your application. Even after allowing notifications in Webkit, they made sure to introduce Live Activities which are exclusive to native apps.
* Users have been indoctrinated by years of marketing (e.g. the "there's an app for that" ads).
* Safari hides the "add to home screen button" deep within the share menu, and home screen real estate is incredibly valuable. Native apps have the advantage of Smart Banners [1].
* For several years Webkit didn't support notifications, and as much as I hate annoying notifications, it's undoubtably useful from a business perspective to be able to ping users and remind them to use your application. Even after allowing notifications in Webkit, they made sure to introduce Live Activities which are exclusive to native apps.
[1] https://news.ycombinator.com/item?id=39181567