the only reason i enjoy hug people as much as i do today is because when i was in high school showing physical affection was mandatory. that was how you told them they had succeeded in breaking you out of your shell, and could now stop trying.
"Being bad at stuff" is also so selective. The other kids are not expected to be two years ahead in math, but I am expected to be able to sit perfectly still for 4 hours and pay attention in an oxygen depleted room. Everybody has to have this nearly exact same skillset.
It's not what society needs, not even what the industry needs in the workforce, but that is most convenient for the teachers.
In fact, your being two years ahead in math makes your inability to sit still all the more disappointing. See above the lesson on Fulfilling Your Potential.
I remember when I was really, really young I hadn't figured out all the nuanced definitions of the word "bad". At some point (I think it was in Sunday school) I told an adult that I put cereal in the fridge once. They said that was bad. So then I was all like "fuck, I guess I'm going to hell"
Things were going great for me too. I was looking forward to heaven. I mean, sure, I'd lied, cheated, had bad thoughts, murdered a few people here and there, had wild sex with everyone, you know, the usual, but it was all good, still goin to heaven. But fuck me, I put the cereal in the refrigerator yesterday and now I'm doomed to spend eternity in hell. I was THIS close.
Nah, kids deserve more credit than that. I'm honest with kids (to an age-appropriate level) because it's vital that they develop critical thinking skills. Considering the world they're growing up into, they're going to need all the training they can get to become able to discern fact from fiction.
I give kids legit reasons. I explore their "Why" questions. Then when I don't know the answer, I'll be honest but supportive, "I don't know, but let's find out." We have to model what being a rational adult is like, and how we come to logical conclusions. Children aren't going to learn this stuff from being brushed off or told some silly explanation.
That being said, it's important to be smart about context. It's reasonable and responsible to disengage from the conversation if someone demonstrates that they aren't arguing in good faith, whether they're an adult or a child. The problem is, a lot of adults jump to whatever explanation makes their own life easier, without any regard to how their response can shape the future adult they're speaking with. If you're truly concerned about kids' futures, you have to acknowledge that there is a lot you know that kids don't know yet. Offer them the benefit of the doubt and seize these opportunities to teach kids how to think for themselves.
One of the things my parents did understand correctly as "new money" is that a significant portion of piddling etiquette rules about what color to wear at what times of the year and which fork goes on the left were largely ways for the bourgeoisie to attempt to maintain their advanced standing against the increases in (the potential for) equality that capitalism initially brought about. Unfortunately my parents are also a very "well we got ours so everyone else must be lazy" type of people who think that's as good as equality can or should get.
Really depends on what part of it. There are things like offering your bus seat to someone who needs it, or waiting for people to exit before you enter. Those indeed make sense.
And then there's what the other commenters pointed out, arbitrary rules about what cutlery to use and in which hand and such.
Considering every culture has completely different etiquette, I'd argue otherwise. We're talking drinking from bowls vs talking during a meal style stuff. I'll hold my fork with the right hand and knife in left, despite being right handed and no etiquette freak can stop me!