A lot of people freelance, landlord or do other activities that are classified as "businesses." So it, actually does personally affect a lot of folks who aren't even full blown businesses.
Please explain what a “business tax” is in the US. Personal taxes are definitely affected if you happen to do business as a sole proprietor. They’re even affected if you happen to have an LLC with passthrough taxation.
If you form an llc, and if you pay passthrough taxes instead then you are perfectly well aware that you are a business and that passthrough taxes are saving you paperwork. If not, your CPA can explain this to you.
This only makes your tax situation _more_ complex if you're intentionally engaging in tax evasion. If that's your use case, then I guess you have a valid complaint!
It’s an additional form that has to be filed away, and then typed in once all the other tax forms arrive. I have no problem reporting business income. In fact, if the IRS just sent me a (contestable) bill I wouldn’t even complain about the extra paperwork.
Again, this does not change personal taxes.