You seem to be conflating my opinion of "iOS's lack of browser choice has the consequence of preventing Chromium from achieving total dominance" with some imaginary other person's opinion of "iOS's lack of browser choice is a benevolent act where good guy Apple valiantly defends the open web". I do, frankly, think that mobile Safari couldn't compete that well in an open market, just like desktop Firefox can't. (Not purely because Firefox is technically inferior, mind you; products don't compete purely on technical merit.)

I think Chromium out-competing every other browser engine is a bad thing.