There are a few advantages to monolights.
1. They plug into the wall. No batteries.
2. They have much more power, which gives you more options for modifiers.
3. They have more power and they plug in, which means they recycle faster (are ready to shoot much more quickly).
4. They have modeling lights, which give you an idea of what the image will look like. If you have the room lights off (mostly dark room), they will generally give a very good idea of what the light will look like. This is a huge advantage when learning. One inch change in the light position or model's nose position can have a significant effect.
That isn't to say you should get them or prefer them over what you have. And if you are not going to use them much, that argues against them.
But I will say that my wife noticed a significant improvement occurred in all of my photography, including natural light photography, soon after I got monolights. Why? I got much better at seeing the light. .
So if you do get them and use them, they might make a difference for you.