Nope. Choosing your software platform on iPhone isn't an option though, if it was then we wouldn't be having this conversation right now.

I mean yes they are - there are so many manufacturers.

With the same argument you can say - open access to every device which will diminish a lot of the security by increasing the attack vector.

Why isn't my TV open or my Xbox or my PS? Why can't I edit the code of Windows is not such a stretch based on your arguments?

Also why should companies be forced to open stuff? They market it as a closed system - maybe respect the consumers who like closed systems. There are options for you - it's other vendors. So you have a choice. But even if you didn't there is no reason or expectation you should have a choice if the market doesn't want to cater.

One possible solution is for apple and other manufacturers to be forced to sell developer devices where the restrictions are minimal or non-existent. That I think will solve your quarrel.