Big social media companies are likely overjoyed to be able to get discrete, government issued info of a person's full legal name, date of birth, residential address (as is printed on US drivers licenses) for advertising and demographic profile targeting purposes. And then be able to correlate it with their existing social media history/clicks/profile, browser fingerprinting, IP address, daily usage patterns, geolocation. It's a massive gift to them.

I doubt they need that to identify you. There are also lots of other problems like algorithmic manipulation. But also just stop using these junky websites. Everyone always complains about Meta doing this, TikTok doing that, and it's like if all they do is make you mad, stop being their user/customers?