If you've ever had any skin conditions, like chronic dryness, eczema, psoriasis, or breakouts, you've probably learned to avoid soaps.
Bar soaps, conventional bar soaps, are made with very, very harsh ingredients that do definitely dry out the skin and cause irritation. Handmade soaps, as long as they're made with natural organic oils, will cleanse just as well as conventional soaps without any of the irritation.
It can be a misconception that handmade soaps are generally better for your skin. Handmade soaps can still contain synthetic fragrance and harsher, drying ingredients, so you still want to make sure you're avoiding detergents, dyes, and fragrance; even if the soap is handmade.