I specialize in runtime code modification ecosystems who happens to work on a (non-Web) Flutter app, and I don't see any intrinsic reason why Flutter will be so

I specialize in runtime code modification ecosystems who happens to work on a (non-Web) Flutter app, and I don't see any intrinsic reason why Flutter will be somehow fundamentally worse for ad blocking than HTML/JavaScript, simply because of its rendering technique: the issue should only come down to how the code is structured and executed and how much of the semantics can be recovered at runtime. So, on such note, I have not examined the output of the Flutter Web compiler to see if it is ridiculously obfuscated... have you? Again, it isn't at all the case that the way it renders matters: it only matters how easy the behavior is to automatically and safely edit. (Frankly, the end game on ads is AI that does its thing on the resulting view: nothing else makes any sense, as it involves people who are incentivized to not help you to choose to help you.)