Gravel bikes I think are meant for both road and gravel. The closer the gravel bikes resemble a road bike, the more it will ride like a road bike. That includes weight and geometry.
If you already have a road bike with low weight, then that's going to be a "standard", especially when riding with a group and climbing too. But if your road bike is kind of heavy, then you will not miss something you don't have.
It's what you want, or think you want. If low weight costs more, then that's the price you pay.