In the talent realm aren’t dancers getting short changed?

With all the flap over Natalie Portman doing or not doing her own dancing when there is a talent competition usually if the fans get to vote the singers get further. There are actors who turn singers, some respectable and many more singers turned actors but you hardly see any singer or actor that can transition to dancer, real dancing not club or street dancing ballet, ballroom, etc and be anywhere near respectable than someone who trained in the art for years. So why is dancing not seen as talented as singing when you can be born with a good voice and ability to figure out how to use it decently enough but you can hardly find anyone that can figure out how to salsa, quickstep, waltz, paso doble, or tango respectability without training?