it means they have doubts. but do those doubts change the historical records that we have? No, those records written by earlier scholars and historians are still there and still say that this person did this and this one did that
we can take it with a grain of salt, but we cannot write it off completely
Nor by the same token can one justify that that the manuscript was written by whoever.
Can one prove that Homer wrote the Illiad? No.
Can one prove that Plutarch wrote Plutarch's Lives? No.
It is the same with any ancient or even Medieval writing.
It is only by tradition that Matthew was written by Matthew. No real evidence. The subject of this topic is "Did any author in the New Testament actually know Jesus?" The answer is simply "Unknown."
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969