Katniss' supposed surgical alteration

Read the books for the first time and got to the part where Katniss is being healed from all her injuries from the games. Holy shit I got really mad when Cinna was telling her the Capitol wanted to surgically alter her after Katniss is bewildered with the chest padding in her victory dress. I know I'm not the only one to conclude that this is to make her a prostitute, just like they did Finnick. They're so sick.