That's exactly what they have to do and some are. However, forming and running an LLC can have it's own headaches depending on the type of business you're running. In some industries, running as an LLC would cost you more than you'd make as an IC.
I've had one for years, it costs less than $250 annual to actually maintain the LLC.
As in Schedule C, on a standard tax form? Most online tax software can handle basic LLC income.
Taxes only get complicated when you want to optimize the amount you owe. Depreciating assets, hiring, firing, claiming losses, etc.