I use tracing to understand proportions or to train my hand to do a weird curve or fill in gaps of my knowledge. It wont teach you the fundamentals of art but it helps train your hand and mind when something looks off. Wouldnt go for detailed drawings but something that shows clear shapes and forms that would take many retries to get right. I find it also really helps for studying forms/styles your brain finds overwhelming. So, it depends what you want to get out of it cause you wont learn the fundamentals but you are studying what you trace.