I can and have worked towards being a "better person," and I did so without this notion of objective goodness. Rather, I reasoned things such adopting a non-judgemental attitude towards people's quirks and odd behaviors and presentations is mutually beneficial for myself and others. This is despite the fact that most people do tend to negatively judge those who are "different."
More or less. We definitely have a sex drive, but because we are sexually-reproducing animals, not because of some "objective force" that makes us so. With morality, it seems social animals developed that through evolution as a way to strengthen group ties and to have more cooperative groups as social animals inherently depend on others for their survival. We aren't like cats, snakes, or bears who take care of themselves and really only need others like them for reproduction.
That is irrelevant as appeals to popularity do not make for an argument. Appeals to popular opinions and positions inherently do not make a statement true or false. Falsehoods and misconceptions are also commonly believed by most people.
Statistics are not "weird properties." They are actually understood well enough that election winners can accurately be predicted with only a small portion of the votes counted, accurately predict what cards will be turned in card games, and reach sound conclusions when analyzing raw data. It's only weird when someone manipulates it, misrepresents it, and tries to make it something it's not. And this has nothing to do with morality.
"Stupidity" only exists in the minds of those who interpret something as stupid. Outside of us, it doesn't exist. There are no laws or theories regarding stupidity, because there are none to be objectively determined.
Think of it like a flashlight. In its most basic structure, it has batteries, a light bulb, an on/of switch, and wires to put them all together. When the switch is turned off, it means the electrical circuit is broken/not complete, and there is no light, but when it's turned on, the switch is positioned to complete the circuit, allowing the electricity to flow. Morality has no such objective rules or procedures. With combustible engines, small and large alike, the timing belts and gears must be properly aligned or the engine doesn't work. This is what I mean by "pass/fail." It either works because the design is sound, or it fails because the design is flawed. Of course it can become much more complicated than that, but even with coding and robotics something that isn't working right means that somewhere there is a flaw in the code, a loose wire, bad circuit board, ect., and you cannot trouble shoot morality like you can a machine.