Is composting a simple compost practice? No, compost is much more, it is a waste management system that reduces waste, reduces the carbon footprint, avoids leachate that contaminates water tables, would reduce the use of chemical fertilizers, we would fix carbon in the soil, among many benefits plus.
You don't even need to have a garden, there are home compost bin designs for indoor use, we can also recycle at work. It's simple, we just have to get into the habit of making our own compost.
Here an informative video of Spain, valid for everyone.