Look at pro riders. Huge seat post showing because they all want/need to be very aero. The frame can fit them by the use of a long stem. I, on the other hand, at age 64 end up with a saddle that is roughly level with my handlebars and use a short stem. Frame size can vary wildly from person to person of the same height, depending on how fit and aero they want to be. A small fitting frame today may be great but in 40 years would be entirely impractical. Enjoy it while you can .