I disagree. That is only one potential issue (grabbing passwords and info from the web view) and the threat is coming from the app it self, not the content loaded.
A big issue comes from potential 3rd party browsers not being hardened to browser exploits which could circumvent device security. It may not be able to break out of the browser's security sandbox but if the browser has access to your camera, photos, contacts, etc...
A big issue comes from potential 3rd party browsers not being hardened to browser exploits which could circumvent device security. It may not be able to break out of the browser's security sandbox but if the browser has access to your camera, photos, contacts, etc...