A buddy of mine took the home office deduction for a few years in the late 1990’s. He read the law and was in compliance with it. The IRS audited him and claimed he was not eligible. He lawyered up and spent thousands of dollars fighting it. He was ultimately successful, but his subsequent distrust of government was entirely merited.
Tax preparers at least have incentives to compete with each other on price and quality of service. They also often guarantee return accuracy. Tax law can be complicated and there are legitimate questions about how to treat certain kinds of income or expenses. These are questions you really don’t want the government making unilaterally.
And if you really hate tax preparers, you can always file a paper return for free using forms available from the post office, as my father and I do to this day. And honestly, if a taxpayer doesn’t owe federal taxes, submitting a paper form 1040 is the simplest route. Slap your W2 income on there and fill the rest out and you’re done. No fees, just a stamp and envelope.
A direct file system will inevitably morph into a black box where the government tells you an arbitrary tax liability amount and 99% of taxpayers just accept it at face value and pay it. You really see no problems with such a system?
Arguments of the form “everybody else is doing it, can’t be that bad” are not compelling, in my opinion. Slavery was common everywhere for a long time. I suppose that made it a good thing?
The government entrenches its power by implementing programs that hand out benefits at the cost of your liberty. Those benefits are always popular, and the loss of liberty is only realized after it is far to late to ever get it back.
But hey, the government claims people saved an average of $240 a year and 6 hours of tax preparation time because of this system. What a smashing success!