The only reason I do it is because I tried drawing on my tablet and it was hard so I watched people overlapping their drawings and I did it and it worked
Well at first it is because when I used for the first time I had to look up videos on how to use then I soon learned how to use it I draw my drawings in a sketch book and then digitalize it
https://www.qfeast.com/page/I0dmVi/My-Drawings-1/photo/fbwb3K