Hello Nudell,
Welcome to the community.
I think you are talking about copy and copy.deepcopy thing inside the function.
The initialize_parameters_deep() is used to get the same set values for all the defined variables that have been used in practice from the beginning.
To answer the below query, this can’t be true in every case.
In theory either initialize parameters function should work.
Also, you would like to check more on this. Look out for this link and this.