The cosmological view

Shalom Rabbi, in your book “God Plays Dice” you discussed Aquinas’ cosmological view and presented Dawkins’ criticism of Aquinas’s allegedly unnecessary use of the concept of God. Dawkins claims that the use of God is a kind of “artificial restraint” and that it can be argued that the first cause is the Big Bang, for example (then God does not need to be invented for this purpose).
You argued in response to Dawkins that the use of God is because his definition does not raise the need to ask about his cause (since he is by definition causeless). The problem is that even though I defined God as the first cause, this does not exempt me from the question – why is this so? Therefore, I did not understand how this argument you raised helps against Dawkins’ claim.