This thread about a “Pink Tax” mentions several examples like a Gilette-brand razor blade costing however much money, alongside the exact same razor blades with the packaging tailored sold as “women’s razors” for more money.
That is back to scammy underhanded marketing of products that are advertised as tailored for a specific application, but really aren’t. Some of the bicycle oils, baby oils, etc., surely fall into that category, whereas high-quality tailored products for certain applications do exist, proving there is no substitute for knowledge and experience.
But perhaps people are willing to pay a premium for reassurance in many cases. For example, a product labelled “baby powder” is presumably safe to use on a baby and contains no asbestos, whereas a plastic tub full of powdered talc that you picked up who knows where may not be.,