Answer:
That is human_scale thinking and understanding
Step-by-step explanation..
If you are going to consider stars(sun's), then you have to thik on a more cosmological scale stars are prodigiously immense which means they can burn 4 million tons of their fuel per second and not even realize it.
Consider this_if the life of our sun is of the order of 8 billion years, then it takes two billion years to bum only a quit of its fuel.
The universe is a very large place and if you are going to understand it, you have to think large.