Well I think that depends on what is being provided, most suggestions I've seen only talk about cover the simple case of some W-2s and other income sources already reported to the government and taking the standard deduction. If that's the case then the government doesn't _have_ to provide everything it knows, it would be on you to know if you have income that wasn't already reported to the government and file yourself, and it would be the same as now in that you don't know if they'll find out about your other income.

But also, there's still the risk of getting audited either way. Just because they apparently don't know about some income _now_ doesn't mean they'll never figure it out later.