Did you read the article? Tech progress in the areas the article talked about slowed down like 70 years ago.
Archive.Is (<https://archive.today>) defeats most paywalls these days. There are other options such as <https://12ft.io>.
It's generally presumed that HN readers will be aware of this.
The quality of paywalled articles is low compared to the other articles submitted and the discussions that follow are significantly worse on average.
That said: you have the option of flagging such submissions, provided you're over the fairly modest karma limit, which it appears you are.