Flyer
Whilst a lot of the modern weight and balance in large aircraft is simplified by the software and hardware you will still be tested to ensure that you can do the calculations yourself for the time you are stranded without the facilities. For this you will need to understand the principles and that is where the line between maths and physics starts to blur.
However the ground school / FTO will ensure that you learn what you need to understand the problem - which is essential rather than learning a database of answers to pass an examination!
I think you got your answers and I wish you luck in the future.
HWB