this is not about protecting businesses. this is about providing jobs for locals. many african countries are struggling with that.
providing an income for everyone is important. keeping everyone satisfied is too. not to mention not loosing your cultural identity. and if the clothing industry is able to provide jobs by keeping cheap low quality products out of the country, why would that be bad? clothing is not the biggest expense people have, so making clothing a bit more expensive is not going to hurt that much.