"We Humans Are Living in a Virtual World" Is Actually the Best Possible Outcome
Here are three mutually exclusive hypotheses:
All civilizations capable of developing advanced technology go extinct;
They do not go extinct, but none of them wish to create virtual worlds;
It is almost certain that we (humans) are living in a virtual world.
These three mutually exclusive hypotheses originate from the famous "Simulation Argument" proposed by philosopher Nick Bostrom in his 2003 paper "Are You Living in a Computer Simulation?".
The interesting point about these three hypotheses is that the first and second are mutually exclusive, indicating that one of them must be true.
If Hypothesis 1 is true, then the inevitable end for humanity is extinction.
If Hypothesis 2 is true, then humanity's future will be extremely bleak.
This implies that the post-human future is extremely dull or monotonous: a super-civilization capable of easily running countless high-fidelity ancestor simulations, yet almost universally choosing not to do so, suggests that their motivations, values, and interests are extremely narrow and impoverished.
They might:
Completely abandon the obviously highly attractive activity of "simulating ancestors" for entertainment, historical research, or artistic creation;
Enter some form of extreme inward state (such as uploading consciousness and collectively immersing in personal blissful experiences, ignoring the external world);
Or their values become completely incomprehensible and indifferent.
This is equivalent to saying: human civilization has struggled through all risks to reach the peak of technology, only to become a "super boring," "super involutionary," and "super ascetic" existence.
For many people, this is even more disappointing than direct extinction—at least extinction is tragic, whereas this kind of future is "living too long but losing all curiosity and vitality."
Therefore, the results of Hypothesis 1 or 2 being true are both chilling. If humanity's future is not one of these two possibilities, then it inevitably leads to Hypothesis 3 being true. Surprisingly, this is the choice that makes people feel most relieved.
The third hypothesis, "we are almost certainly living in a virtual world/computer simulation," is indeed the most attractive, most "optimistic," and even the most exciting outcome. In comparison, the first (extinction) is a tragedy, the second (post-human civilization being super boring and completely losing curiosity) is a form of existential emptiness, while the third brings many positive implications and possibilities.
Because:
Advanced civilizations are widespread and highly developed
To run a large number of high-fidelity ancestor simulations, there must be many civilizations that have successfully passed through all existential risks and reached the post-human stage. This means the "Great Filter" is likely behind us (already passed), and the universe is filled with enduring, powerful civilizations. This directly alleviates the loneliness of the Fermi Paradox—we are not the only intelligent life in the universe, merely part of their creation.
Technological immortality and consciousness continuation become more credible
If our reality can be perfectly simulated, then consciousness is likely computable. This means future consciousness uploading, digital immortality, and self-backup are more realistic. Death might just be the end of "this layer of simulation," not an absolute endpoint.
Our existence has "meaning" and "is being observed"
We are not brief accidental sparks in the universe, but objects intentionally created and operated by a higher-level civilization. They might be:
Studying ancestral history;
Conducting ethical/social experiments;
Providing entertainment or artistic experiences;
Or even out of compassion, allowing us to experience complete lives.