Sure, it’s easy when you have the wall texture that is designed to look like a bad drywall job. If you’re trying to match the wall type found in 90% of American homes, there’s a huge difference in efficiency and quality between a DIYer and a professional mudder.
A good feathering job saves a ton of wasted sanding effort and drywall dust. When I ask GCs and tradespeople which job they would would never do themselves, drywall is far and away the most common answer. It’s the only job I regret doing myself.