While the OP's tone may have been a bit brash, it is true that this policy smacks of anti-competitive practice. Recall the (often quoted) Ma Bell rhetoric: "You may have any color you like... as long as it's black". The same applies to browsers on iOS: "You may use any browser you want... as long as it's WebkitWebView". When Microsoft did this same exact thing; building IE into the OS, people freaked! And I believe they used the same "It's to protect you" line. You may not care, but that doesn't mean they couldn't have a "run untrusted browser" option.
People freaked at Microsoft because at the time they were essentially a monopoly. Apple has nothing like a monopoly. Do we need to go through this every time someone tries to make this broken comparison?