I think it comes also from a place of how you see animals and 'nature' as i feel pet snakes are still more of a captive than a domestic pet. I don't mean that they dislike that captivity, they clearly thrive in it, but it isn't the same as an animal that has evolved beside us for thousands of years.
My feelings toward nature are that it 'just is'. there isn't love or cruelty there, there is life or death, and life that requires death. that isn't a cruelty, thats just the way of things. And at the end of the day the mouse is dead so your snake(s) can live whether you witnessed that death personally or not- don't pretend the butcher at the market just made those steaks out of thin air either![]()