They dont want to deal with potentional problems (like battery drain) of the web platform.

They can ignore it exactly because of their appstore and aura of exellence.

But in real world i know so many people who dont have single app on iphone. They cant even imagine what simple link could give them. This could go very wrong way for apple. Imagine their excelent app devs start to make webap version of their apps. Many of the beatifuly designed ones could work very easily on web platform. Suddenly it becomes trend and iphone app exclusivity is gone. Plus apple looses control over the market.

I for one would like to be able to opt in for notifs for events of certain clubs, galleries etc. It feels like sms for your fans. Much faster than newsletter much less busy than social networks.