I know this has been said already but, here is my 2 cents:
If you are not violating HIPAA,
If you do not post information that could result in someone figuring out something they shouldn't and, thus, a HIPAA violation,
If what you post is ethical,
If all work-related posts are professional (probably best to keep all posts professional),
And if you are not posting at the expense of doing your work (ie no posting unless you are on break),
Then who cares. Social media and the like are not going anywhere. It is best to learn how to do it correctly (ie safely and responsibly) or not at all if it is not your thing. Not everyone who posts on social media is trying to grandstand or fill a deep-seated need for attention. It is just another way to share your life with others.