In Romance of the Three Kingdoms, Zhuge Liang extended his life by praying for stars before he died. Why didn't he succeed?

First, Zhuge Liang's path is still not deep enough. In the Three Kingdoms period, it seems that only Guan Yu became a god (later Qin Qiong and Weichi Gong became gods). Zhuge Liang is the closest to God. Second, Zhuge Liang worked too hard to make up for his life temporarily, and his chances of success were not high. Third, the instruments used by Zhuge Liang to continue his life are not advanced enough. It would be better if he replaced the candle with a more powerful one that never dies. Do you think the luminous pearl tube can be used? It seems that Zhuge's magic weapon is only Zhuge's seven-star sword, but it is the fourth product on earth after all. Continued life is an act against heaven, and it will be condemned by heaven, otherwise everyone can live forever. The above is my personal opinion based on reading novels and the annals of the Three Kingdoms.