Depends on the poo.
I've reviewed the one you used and others from that line in great detail in my drugstore album.
I wash DAILY and my growth rate of .5" (1" with MT -love it!) suffers when I don't. Plus dandruff and my acne-prone skin goes nuts.
For the last four years I only used SLS-free poos. I reviewed two ALS poos with no damage -with DAILY washing, but I worried I was running on borrowed time and stopped.
Now I'm using an SLS poo by Nexxus for moisturizing. I was hesitant but the list of good stuff and the great benefits made me give it a try.
My hair was SOFT ENOUGH TO DETANGLE WITHOUT CONDITIONER. I was SHOCKED.
Even more shine than my naturally healthy hair bling, supple, smooth, lucious strands -BEFORE CONDITIONER.
It is the first time this has ever happened...EVEN WITH AVEDA SHAMPOO!
It's blowing my mind and my review on it will be quite lengthy. I'm going to repurchase it which RARELY happens with me. Thus my 200+ reviews.
So...can shampoo be good for hair? YES.
Do you have to use it for healthier hair? DEPENDS.
For ME, YES. For many others, NO.
Is shampoo ALWAYS bad? Like anything else related to hair care: NO.
It depends on the formula, quality and your hair and scalp's needs.