It's hard to tackle the complexity of the tax code when the company you're defending here has spent millions to keep it complex and out of the hands of the government.[0]
The "tax complexity" argument is a red herring when talking about tax prep. The US government could absolutely offer free tax filing services to taxpayers without the help of private industry and also without needing to simplify the tax code. I'm not saying that the complexity of the tax code isn't a problem, but it's out of scope here. The idea that the complexity of the US tax code standing in the way of better filing options for taxpayers has absolutely no merit when companies are spending millions to fight legislation that gives the government the ability to offer its own tax prep software.
This is rent-seeking behavior on the part of private industry, plain and simple.
0: https://www.propublica.org/article/filing-taxes-could-be-fre...