Metamucil Supplementation Question

It was recommended I use Metamucil to help alleviate some issue I’m going through right now. When reading through the ingredients I see artificial flavoring and food dye. I’d rather not put that in my system. I also noticed it really only had 3g of fiber. Wouldn’t I just be better off increasing my fiber intake through foods? Or is there something this supplement does that food fiber doesn’t?

Thanks for any help