Make circular our design principle?

Was wondering how marvellously found ways to break that cyclic, interconnected systems in nature.

Some instances:

Fruits
Ever wondered why plants and trees put in so much effort to make fruits - juicy, tasty, beautiful? Fruits hold their children. In seeds. So whoever eats the fruits whether insects, birds, animals, humans - they are expected to drop seeds in the soil to let new plants emerge. Better still to drop them in the soil with a wrapping of manure (their poop). 

Today, humans and human systems tend to not do that. When we eat fruits, it doesn't occur to us to hod the responsibility of dropping the seeds in the soil.

Sewage
Excreta is a great way of returning nutrients to the soil along with some carbon. 

Decade after decade we have learnt to create large systems of drainage (if at all) that make it difficult for the nutrients to go back to soil. And we take it to a point, where sewage become a havoc to manage.

Flowers
You can guess, they are made attractive to enable pollination. We find them beautiful - use them for decorations or in places of worship, interrupting pollination cycle.

All these are instances of human beings bereft of their real context, nature. 

All the more, we need to heal our relationship with nature. And make cyclic process our design principle. Fragmented linearity will cause extinction.