YouTube still tracks you based on your IP and other environmental variables. Your browser’s user agent alone can tell them something about you. The resolution your screen uses, the speed in which the page loads and many other factors all correlate with certain profile properties.
They may not have your exact name and hometown, but they can definitely generate an indication of income and general area, amongst others.
I mean, the meme doesn’t disprove that. Like, it’s true that the internet did have people saying that. That said, modern social media and their algorithms have made the process (of misinformation) much more streamlined.