The whole picture is more complex, as others are pointing out, but sticking just to evaporation - the point is that more energy in can lead to more humidity at

The whole picture is more complex, as others are pointing out, but sticking just to evaporation - the point is that more energy in can lead to more humidity at the same temperature. Phase changes like evaporation consume energy without increasing temperature. Land masses don't experience phase changes at regular temperatures reached on the earth, so more energy in just leads to higher temperatures.