Earlier quoted context omitted.
All 'cars' are compromises. Any low-riding sports car would be damaged by riding on a rutted road, that's the tradeoff inherent in purchasing one. Lotus (say) isn't saying you can't drive here or there, they just build cars that happen not to be suitable for a given activity. A passable analogy since car manufacturers have far less ongoing control might be Lotus voiding the warranty for your Elise if you took it on a…
But If I want to ruin my iCar (say by putting it in a blender) then I should be able to. That can void the warranty, but I shouldn't be physically stopped from doing it. Another car analogy (which cuts both ways) I can think of is the Nissan GTR -- it has a speed limiter built in that stops you going over a certain speed on normal roads -- but then when you are on a racetrack all limits are off.
You have three choices: Buy Apple and color within the lines. Buy Apple and jailbreak, lose stability in favor of features. Buy Android.
Frankly I find it difficult to muster much outrage over Jobs' tyrannical jihad against openness (or whatever) when there are so many available alternatives. Many people are quite content with a walled garden approach; castigating Apple for taking their money seems backwards.