What is classed as a social media? I expect they'd want to view by personal instagram, but what about my old business Xitter account that I can't even get into because something went wonky with the 2fa? What about my github? My HN account? Do they want to see my discord history? How will they find my accounts anyway? Not all of them are under the same account name, real name or email address
The answer to all of those is "yes" and they will not bother to find them, they will ask you to list them. Omitting information or providing false information on your visa application is a felony.
It's the same logic as behind the "Are you a terrorist?" question. Lying is itself a crime, and can be used to prosecute you in the future.
I think the point to many of those questions/requirements are to ensure absolutely everyone can be prosecuted or deported because it's basically impossible to complete the immigration process or just about any other complicated government process without doing something that could possibly be construed in the most uncharitable way as being answered incorrectly.
"You failed to tell us that you made a single post on an obscure forum 4.5 years ago that questioned if capitalism was truly a good system, have fun being deported to a random country, you communist"
I've quoted Marx on HN on more than one occasion. I'm not sure they'd like my social media profile, despite having also been consistent in arguing for liberal freedoms that the US used to like to claim to favour.
I've visited the US many times, but I have no intention of going back under the current regime.
I transited through China earlier this year, and I frankly felt less concerned doing that - despite having criticised the Chinese government online many times over the years - than I would feel about entering the US at this point.