NO ONE sits down with a pen and 1040 form and DOES their own tax.
Try not to pretend that you know what everyone else in the world does.
I still use a pencil, a pen, a calculator, and a paper tax form, and no software. I fill out one form in pencil, make corrections if needed, copy it in pen, sign and put the form in an envelope and mail it to the IRS. I am someone.
Yes, I have a mortgage, other itemized deductions, capital gains, etc.