Perhaps nevermind the Sun, Moon and planets etc,...but like yourself and others, I too have often contemplated this 'ultimate' question.
> "I’ve always thought it odd that scientists recognize that something as subtle as a butterfly’s wing flap could affect a weather system many months and thousands of miles away - but dismiss out-of-hand the possibility that the positions of our ocean-lifting moon or planet-swinging Sun could have any effect upon a sensitive developing foetus."
Maybe an element of truth.
However by extension, what do you think of this image in respect of your ideas?
"An estimated 10,000 galaxies are revealed in humankind's deepest portrait of the visible universe ever."
My question is:
On the 'butterfly supposition', if it were possible (somehow) to eliminate from existence just one of these 10,000-odd galaxies in the image (like a butterfly-flap gone wrong), would it make any difference to our own Milky Way Galaxy, the Solar System (infinitesimally small by comparison), the Earth itself and hence our own lives?