I still think you are seriously discounting the added convenience and peace of mind. If I was an older person who wasn't super comfortable dealing with compute

I still think you are seriously discounting the added convenience and peace of mind. If I was an older person who wasn't super comfortable dealing with computer programs, I would absolutely pay a CPA a few hundred bucks to do my taxes. It saves me time and I don't have to worry about screwing it up. It's the same reason people get food delivered. I'm paying someone to cook food and bring it to my house. It's something I could do myself, but its a hassle that I can pay to avoid. Plus, I can be confident that a professional chef is much less likely to prepare me burnt / raw / untasty food than I would be myself.