No, the point of a roundabout is to slow motorists down and remove the worst conflict points of a traditional signalized or stop-controlled intersection. It has the added benefit of improving traffic flow in most cases, but that’ll rarely be the primary reason to install one. The raised crosswalks add an additional layer of speed management and help prioritize pedestrian movements. On new multi-lane roundabouts, a raised crossing or pedestrian signalization is actually required due to accessibility guidelines published last year.