I don't suggest them to kill every single talented child. I suggest them to "not helping Red Lotus become a Venerable" Duke Long didn't tell Red Lotus "you have the talents to become a Venerable". He told Red Lotus "you are fated to become a Venerable." "Red Lotus became a Venerable" has been predicted in a prophecy. And to help him pass three Myriad Tribulation, a lot of HC's members died. Not counting numerous resources they provided him. I think that's stupid. You think so because the translation didn't reach these points: Spoiler: 1 In the later part, FY, under the fake identity "Sea Qi Ancestor" got the inheritance of Primordial Origin Immortal Venerable from Duke Long. It stated that Triple Qi Retraction needs these 3 Gu (can't be replaced) You should read c1367 again. It stated that to master Triple Qi Retraction, Gu Master needs to practice a lot. Duke Long can use that move, it means these 3 Gu were in HC's hand from the era of Red Lotus. Spoiler: 2 No one can. FY specially stated that he felt the restriction came from Fate Gu itself. Spoiler: 3 The problem is that 3 Venerables leave a lot of tricks to protect Fate Gu. These tricks make FY failed on his first try. It's like they locked something in a super-good vault with the hope somebody can steal it.