Lawnmowers only take about 16oz of oil and you can buy 5qts(160oz) for $23 here in the states. So that $23 would last 10 years of oil changes if you replace it once per season like I did.
Not sure what that would cost you in Europe. So maybe that's where the disconnect is.
Can't speak for everyone. But for myself, the world and humanity was created with free will and it's up to us to choose good vs evil. God only has dominion over the heavenly afterlife and the hellish afterlife is forced to exist on the principle of yin and yang. There can be no good without evil.
For context I consider myself agnostic but was born roman Catholic and base my morals on the teachings that everyone was created equal and forgiveness should be shown to those that can be helped. Forgiveness isn't a requirement in the cases that someone willingly chooses evil in the face of morality over and over. (Putin, Hitler, Trump, Netanyahu, serial violent criminals, etc.)