Yes, it's an add-on and not built into Chrome... and yes you have to know about it to install it in the first place. I'm not exactly sure that's a problem though - if you are technical enough to navigate through settings menus in your browser, understand what the settings mean and toggle options (presumable to enable some built-in version of uBlock Origin), then you clearly have the capability to install the add-on.
Browsers filtering "known trackers" is a very quick slide into "known malware", "known spammers", "known foreign propaganda", "known conspiracy theories", "known fake news", and more.
It's the exact path that social media and other online platforms took, and guess what? The same companies build browsers.
With that, I also agree that Google couldn't be trusted to editorialize.
Related: I don't understand why people choose to work for Google
"You've gone incognito" doesn't mean what it says on the tin.
It means "You've gone incognito... from other users of this computer, not from us. From us you're still plenty cognito."
By that regard, you aren't buying Apples, you are buying "Golden Delicious Apples certified organic by the State of California and could contain random chemical that might cause cancer to you"
Still apples, but now you question whether they are truly edible or safe, which you used to assume about all apples
Now that it is known google can track you outside of stored cookies it should probably be relabelled to no persistant cookies mode and leave the idea of incognito. Using that word makes it seem like you are using tor.
The disclaimer put front and center is designed to tell you exactly what is going on. But, I'm not at all surprised that most people assume incognito/private modes provide far more protection than they actually do.
This is a fairly difficult and important technical communication problem: To make sure that most people after reading something understand what is meant. It's why you end up with all those really stupid sounding disclaimers on various products not do stupid things that seem obvious not to do.
What is actually communicated is dependent on both parties in the communication. An entirely accurate statement can be made by one party, intended to communicate the facts in good faith. However, depending on what the second party knows, the statement may not actually communicate what was intended or what is true and accurate.
The difficulty then is saying something which is short enough to actually get read and still communicates to a large majority of people an accurate understanding of the situation.
Again, this is the best case where the people making the statement are acting in good faith. It all goes down hill from there though, if they are actually trying to mislead.
"you can browse privately, and"
to
"you can browse privately, in the sense that"
What does a user think browse privately means? Do they think it means "your browsing is shared with third-party data brokers that aren't displayed in the UI at all and you might not know exists?
It's one thing to say "well obviously we can't control what you choose to do with foobar.com"; it's another to say, "the same legal person who told you 'you can browse privately' is buying your browsing data from foobar.com".
"Now other people who use this device won't see your activity."
What does the bit before the 'and' mean?
To paraphrase it another way, it says "what you do on your browser is hidden, specifically it is hidden from other people who would try to find out using this device"
Further, given the overall ambiguity of English, and given the goal is something casual, not legalese, the way it is phrased is reasonable.
Actually, that raises an interesting point, how is this phrase rendered by chrome for other languages, and do any of them phrase it in a less ambiguous way?
"Now you can browse privately, and other people who use this device won't see your activity."
It goes on to list other technical specifics about what is not saved, but those are pretty much just sub-points. I'm not sure it's fair to expect Incognito to do something it's not meant to do.