Aside from the mountain of actual evidence, just to build a philosophical intuition against fine-tuning - you need to appreciate the enormous scale of trial and error at play.
- The Earth seems like the perfect planet but looking out into the sky there are trillions of planets that aren't perfect at all.
- Most likely the universe also appears "perfect" for the same reason - there must be a graveyard of universes where the parameters just didn't work out for life.
- Evolution is much the same - many mutations occur all the time, most are fixed by cellular machinery, most that aren't are deleterious, but once in a while a helpful mutation emerges. Take a moment to understand the timescale involved. Don't just handwave away 3.8 billion years as some number - feel it, starting at 1 year and stepping up each order of magnitude. You will realize that a million years is essentially "forever ago", and we had 3800 of those to get here. Consider how many species exist that aren't civilizational sentient intelligence.
- The Earth seems like the perfect planet but looking out into the sky there are trillions of planets that aren't perfect at all.
- Most likely the universe also appears "perfect" for the same reason - there must be a graveyard of universes where the parameters just didn't work out for life.
- Evolution is much the same - many mutations occur all the time, most are fixed by cellular machinery, most that aren't are deleterious, but once in a while a helpful mutation emerges. Take a moment to understand the timescale involved. Don't just handwave away 3.8 billion years as some number - feel it, starting at 1 year and stepping up each order of magnitude. You will realize that a million years is essentially "forever ago", and we had 3800 of those to get here. Consider how many species exist that aren't civilizational sentient intelligence.