By doing so , we may discover the benefits of simply watching a sunset.
这句话中,so为何不可以换为such?such也可作代词,譬如:We were second-class citizens and they treated us as such.
当do用作替代动词时,常见的结构为do so, do it .不说dosuch. 不可照搬as such, as such是习语,你不可以说as so, as it. 学英语要从阅读中熟知各种习惯使用方法,不要想当然。不要随便去改动原句。