You say this like it's just a thing that people can do. But the people you're telling to "Just do this" have already been trained to be terrified of the IRS. Many of them are currently paying huge fines due to missing their returns in prior years. Any small mistake can hang you when you're impoverished, precisely because you don't have any room for error.
"Most Americans" is an umbrella that contains mostly service workers. The people that serve you food, bag your groceries, drive your amazon purchases, and so on. If you've spent a lot of time with people like this, I encourage you to ask them "Hey, do you pay someone to do your taxes, or do you do it yourself? Why?"
I'm pretty sure the conversation will go "I pay. I just don't want to worry about it." And that "worry" is because they've been hit hard in the wallet, because the (American) government is not friendly when it comes to messing up your taxes.
If I am mistaken about this, I would like to know. But this is true of my extended family, and I'm pretty sure it's true for most of their friends.
