Water generally make things wet but hot showers cause dry skin.
Your skin retains moisture due to a thin layer of oil on your skin. Taking a hot, soapy shower removes the oil from your skin, making it easier for the moisture in your skin to dry out.
The hot water is breaking down the oils in your skin. Dry skin isn’t just about water, it’s about oil, because oils are what keep the water in your skin from easily evaporating into the environment. That’s why lotions help: they are just artificial, nice-smelling oils you use to replace the natural ones after washing.
Your skin has sebum glands that produce an oily substance which moisturizes the skin. When you use hot water (and moreso soap) all the sebum is washed away resulting in dry skin. Just getting your skin wet doesn’t make it moist, oils are what moisten skin by allowing the skin it hold moisture itself.
It’s because the water takes the natural oil off our skin, which is why it’s not recommended to shower every day
Not 100% on this but based on the science. Oils in the skin react differently to hot water and wash away more easily leaving your skin feeling less moisturized