hi i'm fairly new to road cycling. i noticed that the saddle height/seat post is raised fairly high for most advanced and pro riders. i would assume that would make the reach to the handlebars further away. to compensate, would you ride a smaller frame and raise the saddle height?

for example, if someone was fitted on a 51 (53 effective tt) with a relatively low/normal saddle height. would they size down to a 48 (52 effective tt) and raise the saddle height higher? i didn't really know how to phrase the inquiry, sorry if this is a stupid question.