So because you want to provide a better UX for the one time you install the app, you want to sacrifice the UX of every single time you actually use the app. That makes no sense at all.
I'm not sure what you're referring to. Which UX issues are insurmountable in a web app?
Generally speaking, they can all be worked around by a good designer. The inferior install, update, and cross platform experience for native apps can't be worked around.
Are you talking about like realtime video authoring apps or games? I'll admit in those categories the web is often not the best choice.