ZSK> What Pekak said is true – Sifrei Shu”t are practical applications of Halachik issues (which is why they are usually more interesting than Gemara itself).
Right, I am just asking whether we-all live accordingly. 500 years ago, someone who learned gemora would be able to navigate his daily life. A lot of issues we are facing today are post S’A and post Mishna Berurah that created some unified halochah. Responsa differs by a group, most people do not learn it directly, so we are back to pre-gemorah mode where each one is asking his local rav and hope that he’ll ask the right posek.
Theoretically speaking, “gemora” means not the fixed dafim, but abilty to analyze sources of halochs (see Rambam). so learning how to navigate road traffic is no different from watching your cows.