Im not saying dont do them, but if you get stuck why stay in that and not give yourself opprotunity to learn how you need?

Kids all learn math in their own way, so teachers cant rely on a textbook to teach 100% of students. Its why tutors exist for 1x1 learning.

Im just stating dont get upset if you are stuck/feel like you are no capable. When for many it may just take googling images or finding a video with other methods.

Then once past the hurdle hop back in to drawbox and you can move forward. As an artist we are our own worst critic, so if you do hit a wall its hard on its own, but to hit one in a lesson shouldnt make you feel like there is no way past.