Something I find unusual is that many people are horrified by the idea of achieving financial independence by not having kids, even though not having a child will save you hundreds of thousands or even millions of dollars over your life.
Instead, when most people give financial advice, they focus on little expenses such as skipping Starbucks, Netflix, or avocado toast. Anyone who drinks lattes, plays video games, etc are usually accused of wasting money on these activities. However, if someone doesn't have kids, they are spending significantly more money, yet such activities are not deemed wasteful.