Even then buying and selling stocks, having a 401k, IRA, etc. doesn’t even make it complicated. You just have to fill out a 1099-B/DIV/INT and then list your contributions to your retirement accounts.
I don’t know why people pretend it’s so hard. You spend 30 minutes every year answering a few questions and punching numbers into boxes from a few documents that are sent to you by your broker/bank/employer. It’s also only $15 at FreeTaxUSA.
Opening the accounts you report to the IRS is arguably more difficult than filing them on your taxes.