It takes a long time, a lot of skill and patience to grow an Oak bonsai like the one above.
With the right care and attention a bonsai will last for decades and longer.

Given that observation it takes a lot longer to grow a mature Oak in a forest or woodland.

Left to their own devices trees can take on extraordinary shapes.

I like the oil painting Two Oaks by Jan van Goyen from 1642 available to view on Wahoo