It’s hard to get a good read on these things. You’ll only see the perspective of the person that thinks they were cheated by the IRS. The IRS won’t make Reddit posts about people carrying out tax evasion.

Likewise you say the IRS dont think it’s a business. They probably carry out much stricter measures than that. Probably much stricter than the people complaining on Reddit. The people complaining also only “think” it’s a business.