No, hair is not living like skin. Usually when people talk about hair "getting used to something" its because they have build up in their hair and the product is no longer effective. Its perfectly fine to switch products as often as you want or use the same ones as long as you want. As long as your avoiding ingredients that can build up or removing them properly you should be fine

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Loves protein and oils

Low-poo: MopTop gentle shampoo
Co-wash: CJDF, Jessicurl Aloeba
RO: Jessicurl Too Shea, MopTop daily conditioner, CJ rehab, CJ strengthening
LI: ^^^
DT: Jessicurl WDT, SS Deeply Decadent
PT: SS protein treatment, Ouidad 12 min
Oils: argan, sweet almond, jessicurl oil blend
Stylers: SS firm hold, SS curl enhancing jelly, Kiss My Face Upper Management gel, AG Recoil