I personally feel there is nothing wrong with incorporating commercial spiritual products in one's work. I would caution one not to fall into the trap of being completely dependant upon them. The marketers do not want you to learn the old ways. They desperately need you to get into the mind frame of thinking that in order to do a work one will need the proper spiritual supplies, usually the ones they are selling. This is how they stay in business.
I would also advise practitioners to learn to create their own condition oils, incense, powders, etc. This will also help one cut-down the dependency upon commercial manufacturers/marketers.
I would also urge practitioners to purchase any spiritual supplies from old-school workers who do not have a team of people working for them who make products. Oils, incense, and powders, and other supplies made by an old-school worker by hand themselves, prayed over, and prepared in either limited quantity or better yet, specifically suited to the individual customer is the best choice. Such would be far closer to the original practices of the bygone "golden age" of hoodoo. Please don't be fooled by marketers who try to fool customers by claiming they pray over or bless their products. The type of prayer or blessing these marketers are referring to generally refers to a large batch of products which has had perhaps one prayer or Psalm 23 prayed over the whole lot. This is not the same thing as an old-school worker making a bottle of oil suited specifically to the customer and praying over and blessing that individual bottle.
These are just my suggestions, take them or toss them as you see fit.