I’ve been making lasagna for many years. I should be really good at it by now, because with practice we do get good at whatever we invest our time and energy in. But just because we get really good at something doesn’t mean we’ve perfected it. No matter how skilled we are at whatever we’re skilled at, we can always find ways to improve. And that is why it’s healthy to focus on becoming proficient (getting it right more often than not) rather than being perfect.