Because universe is everything that exists therein: space-time, planets, stars, galaxies, inter-galactic spaces, even sub-atomic particles, and all matter and energy.
Not let me contrast the universe with the people living on Earth. There is so much of hatred, animosity and division across the globe. People are living in walled-nations.Their nation is the best. When disasters happen, they mourn death selectively. And they accuse each other. They avoid going by the law of causation.
Indifference is the fact or state of being indifferent; lack of care or concern. Yes, people simply disregards others. Take a super-power country such as the USA: how come 46.5 million people live in poverty if the care for other others. They are simply being indifferent to the suffering of others. It is the same almost everywhere. We hear only empty rhetoric of the politicians.
"The answer my friend is blowing in the wind, the answer is blowing in the wind."