Even if there are no moral facts, it is still possible that there are moral facts, and there is therefore a non-zero chance that there are moral facts.
No, this sentence is self-contradictory. If there
are no moral facts, it is not possible that there are moral facts. What you mean to say is: even though we don't know any moral facts (which I don't accept, but I'll grant it for argument's sake), there could be moral facts. I'll be charitable and read your statement as such.
But we can only achieve those values if we have the power to do so.
That's presupposing quite a lot about what those values are.
For example, if a moral fact is: "One ought to be kind to others," one most certainly does not need power to fulfill that obligation. If a moral fact is: "One ought to keep to one's station," achieving power is actually immoral.
Furthermore, it might to turn out to be the case that getting as much power as possible is a value, so the unpredictability of what values might turn out to be true makes it necessary to become as powerful as possible (and since there actually are no moral facts, there is no reason not to do this).
What if the supreme moral fact is to be humble?
If you want to embrace nihilism, fine, but don't attach this pseudo ubermensch shit to it.
"Perhaps not voting is related to some kind of desire to gain plausible deniability regarding how society functions." - Rainbow Crow