The metaphor that’s popped into my head recently is baking bread.
You can learn to bake good bread. It’s not _that_ hard. And it’ll probably taste better than store bought bread.
But it almost certainly won’t be cheaper. And it’ll take a more more time and effort.
Still, sometimes you might bake your own bread for kicks. But most of the time, you’ll just buy the bread someone else has already perfected.