Defaults do matter, I agree, and it's also ok to complain about any given default option if one thinks it's a bad option.

That doesn't make it ok to lie and mislead people in the process of making that complaint, though. It's very very easy to change the default search engine setting in iOS. It's about as easy as Apple could possibly make it. To allege otherwise, or to state that "jail-breaking" is somehow required, is simply a lie.

Just make the argument without lying.