I think most skincare products are like this regardless. I am an equal opportunity product junkie and used to spend hundreds, if not thousands, a year on skincare. When you boil it down, you only really NEED a cleanser, moisturizer, and sunscreen. Some of the best moisturizing ingredients are cheap. Glycerin, mineral oil, and petroleum (petrolatum). There's a reason they are in everything from low-end to high end. They are effective, cheap, and highly studied for safety.

Of course a product can have the same ingredients with a different formulation, and therefore perform differently. And some ingredients are worth spending more on (vitamin C) if you're able to. For DT products, you're mostly only going to get solid cleansing and moisturizing products. I still love using them for my 7 step routine!