What are the benefits to you? Would you install software or run programs you don't want accidentally? What would you miss if there would be some form of safe mode to be toggled on or off?

To me this argument doesn't make sense at all.

I think iPhones are decent phones and Android devices are just as walled in. So all smartphone platforms are more or less suboptimal. Sure, Android can be modified, but only to a degree heavily depending on the hardware...