Nah its a fun concept.
Like imagine you just go back in time and randomly kill a person. Bam, a lot of people never get born, history changes dramatically.
Having a child is biggest butterfly effect you can have on the space time contiuum. Want more chaos, have more children. LET CHAOS REIGN!
But other people fill their roles, with the main difference being just genetics, so probably on average very similar behavior. And most people don’t do anything too exceptional or history changing. So would “ending a bloodline” really be more impactful than say causing a traffic jam, if all it’s really doing is applying a passive RNG shuffle to everything?