A painting does not have to be like a painting at all times, no.
Sometimes just a splash of color will do fine on your wall...
Yes sometimes less is really more...
One or two hues, no shades, very simple but strong lines, may create the cutest graphical figures.
Check the pictures below, and I am sure you will agree...
Design is the Salt X Pepper of life. It is not a must, but if you have it, then you have the appetite for life.