It is not New Testament scholars, it is some New Testament scholars, apparently the ones you read and/or favor.

Origen wrote of Hebrews: “If I were asked my personal opinion, I would say that the matter is the Apostle's but the phraseology and construction are those of someone who remembered the Apostle's teaching and wrote his own interpretation of what his master had said. So if any church regards this epistle as Paul's, it should be commended for so doing, for the primitive Church had every justification for handing it down as his.”

The content is certainly Paul’s.