Because a thiccc butt comes with thiccc legs. In South America women have never been preoccupied with the size of their legs. It’s all about the butt and no one cares if you have giant legs. Actually you can be thiccccc all over as long as your tummy is flat. Looks like Kylie is going for that look over here. Or, she could have gained some weight and since there is not a single fat cell left in her abdomen or arms (all sucked out), it accumulates in her legs.