There's something with web/mobile that makes people afraid to do anything without sandboxing the living hell out of every app, even though we've managed to live with unsandboxed desktops without many such incidents. I can't exactly put my finger on what is going wrong (it has definitely something to do with installing random crap and the new business model of companies trying to monetize user's eyeballs and data), but the push towards sandboxing is a symptom of that problem.