No, you misunderstand...you can still open Camera Raw hosted by Photoshop from within Bridge. Command O (assuming you haven't changed the prefs in Bridge) will open the image "hosted" by Photoshop not Bridge. If you do a Command R, then it'll open the image in Camera Raw hosted by Bridge...that way you can open and edit images from Bridge without having Photoshop even running. But when hosted by Bridge, it'll be the 32-bit binaries of ACR.
Remember, both Bridge and Photoshop can host ACR...but that doesn't mean you CAN'T open images from Bridge into Photoshop. Check he ACR dlog, if "Done" is the highlighted button then it's being hosted by Bridge. If "Open" is the highlighted button then it's being hosted by Photoshop.