Can you advise about social media if you don't use it?

As a journalist I work with a lot of PR people because they help me get my job done. These days many PR people have to also work with bloggers and also advise their clients on how best to make use of blogs, Facebook, Twitter and any other social media.

I recently met a senior PR person who says she advises clients about social media, yet she doesn't blog, she isn't on Facebook, or on Twitter.

I said you can't know about social media if you aren't involved in social media. Plus, the trends and fashions within social media change all the time. If you aren't involved you won't know what those are.

The only way you can "get it" is by being in it.

She strongly disagreed. She says she knows all about Facebook and Twitter and blogging even though she doesn't blog or leave comments, she isn't on Facebook, and doesn't have a Twitter account.

There was no sense in continuing that conversation because her position is nonsense, imho.