You are entitled to that opinion; however, the reality is that at most US based corporations there are specific guidelines about conduct of associates in the social media space. You may disagree with these policies, but employers have them regardless and since it is at-will employment you accept those policies to work for that company. Certainly some employers are more relaxed than others.
This also applies to employment outside of the private sector as well. I watch a school principal be maligned by a disgruntled parent to the Superintendent and the School committee…the cardinal sin in this case was of a photo of her and her husband at a wedding in which wine glasses and bottles were on the table around them. The wedding was of course not during school hours, she was not drunk or committing a lewd act. It was just a nice photo of the two of them attending a wedding over the weekend and the background showed that alcohol had been consumed.
The parent posited that “Are we to allow a drunk and alcoholic who parties every weekend to educate our children and run our schools?!”
Most reasonable people would consider that to be a ridiculous conclusion and dismiss it…but the world is not filled with reasonable people any longer. The principal was taken to task. Reprimanded. Given a formal notice that if any “evidence” like this of conduct and behavior that is possibly threatening to the children of the school surfaced again she would be terminated.
Now, you can rail against this all you like. You can point out all that is wrong with it. But that is reality. It isn’t fake news, it isn’t alternative facts. This is the world we are living in today.