I think you have a point. I think for large numbers of people that’s probably just fine. Most people should sort of know what’s in their report, as they applied for the respective credit, and made (or not made) the required payments anyway.
The reason why I regularly check my credit report is, because no one is perfect.
Identify fraud is rampant (no doubt the fact that we share our whole life with the whole world nowadays plays a part in that, as do the massive amount of data breaches happening all the time). I had a friend who had this happen. Someone had taken out credit in his name, and obviously not payed it back. He didn’t know until he was declined for credit, because from the view of the bank he had defaulted on that credit that he didn’t even know existed. That took him ages to sort out.
Another thing that happened to me (and I chronicled that elsewhere in this community): my phone provider simply incorrectly reported a non payment (they hadn’t collected a direct debit due to their fault). Because I was monitoring my credit report, I noticed and contacted the provider. After some back and forth they corrected my report. I did happen to apply for a mortgage shortly afterwards, and while I have no proof that my application would have been denied if the default had still been on my report, I certainly think it wouldn’t have helped.
So, monitoring your credit report is (in my opinion) mostly helpful to correct errors, and to help with the clean up after identity fraud happened.
That’s my opinion and I’d love to hear others!