"complain to my support forum when it doesn't work ... "Or what if the user installs a malware fork of DeadCat instead, and hacks my app?"
I can't help but think that all of this is potentially a thing because the boundary between app and web is extremely blurred.
You should be able to hand a URL to a web view (whatever it may be) and that web view render the content on the screen and go back to you with a success or fail result code. Maybe, in specific circumstances, it can provide you with limited data (such as the content of a file it fetched, like JSON or whatever). Much more than that, and it's a security risk for your app and your users.
Furthermore it can help to segregate permissions, your app may require access to a user's photos, say, but the browser part doesn't.
"I feel that I don't want users to install"
I feel that I don't want your app to ignore my choices for blocking/whitelist, my language preferences, whether or not to fetch large media files, my saved passwords, and so on. You are, instead, expecting me to trust god knows what, that will happily download and run god knows what.