It is not easy keeping one reality intact, especially when it is up to yourself to make it and make it right.
Of course you make your Genesis Frog right eventually in order to have brought yourself into existence up to the point of ensuring your own, but… how long did it take?
How many Frogs did you have to cross-clone along the way to make the right one?
How many times were they so close, but were still missing bits and pieces of the correct ectogenetic code?
How many of those codes needed replacement entirely?
How many times did it take to get it right?
How could your ectobiology have been flawless if you are not omniscient beings, if you were brought into this world in mortal bodies, if you cannot even fully comprehend the mechanics of the forces you are toying with?
How can you be so sure you did not make other almost-stable realities along the way…?