The actress and activist held nothing back when we saw her Tuesday in Bev Hills, and brought up Rogan's podcast.

We pointed out several celebs had come out in support of Joe, but Sharon's not buying his and Spotify's new policy -- namely, adding a disclaimer at the beginning of episodes, and offsetting controversial COVID viewpoints with a "mainstream" take as well.

Sharon tells us the only "disclaimer" she wants from Joe is for him being an "a**hole." Watch the clip (pardon the soft focus due to equipment snafu) ... but, in a nutshell ... she says it's too late for Rogan's new balanced approach.

In her mind, his interviews and COVID theories have already cost people their lives. Might sound harsh, but that's her POV, which she says it's based on doing significant work in the field of infections diseases.

SS lays out her creds, particularly on HIV ... seeing the horrors of deadly viruses while working with leading doctors and scientists, including Dr. Anthony Fauci.

And when it comes to COVID, it's personal for Sharon. You'll recall, the virus killed her grandmother and godmother ... and her sister and sister's husband were both hospitalized because of it.