A smartphone does nothing what a desktop computer (with ubiquitous root access) doesn't and apocalypse still hasn't happened.
Your literal argument was used for game consoles as well (Oh egads, what will happen if we allow freedom to infest our DRM protected systems?!) until Valve proved everyone wrong.
Maybe instead of spewing the same corporate profiteering arguments here, perhaps think on how we could design our software for freedom AND security and whether defending megacorp monopolies is worth the small improvement in security you're getting in return?