No, it is not claiming a cause. It is a part of the Doctrine of the Trinity.The concept of eternal generation is claiming a cause [generation] without a beginning, which is conceptually contrary to being Yahweh who is being without cause.
It is an important aspect of the Nicene and Chalcedon Creeds.
And is expressed in the following creeds:
Westminster Confession
1689 Baptist Confession
New Hampshire Baptist Confession (1833)
First London Confession of 1636
London Baptist Confession of 1644
(To name a few)
People challenging eternal generation is a relatively new phenomenon. I think it is because so many study tools are easily avaliable and people mix them up with modern or secular ideas/ definitions.
Eternal Generation is the idea that Jesus is the Word, and that He "goes out from" the Father. His position in the Trinity is eternal.
People who believe this doctrine typically believe in what is called "Christophanies", that is encounters with Jesus....or the Word... in the OT.
If you disagree with the Doctrine of the Trinity on this issue, exactly how do you believe Jesus' position within the Trinity changed?