CPR doesn’t work too often in many cases, you likely need to be certified regularly, and have the temperament to not choke under pressure. It’s certainly not something that needs to be taught to everyone at the expense of educational time.
I agree, it’s just as unimportant as learning how you quote people properly on a message board :D. But seriously, how many lessons, facts, or concepts from school do you think you will use or remember? Can you correctly label a chemical compound or solve a quadratic equation? Do you know the difference between the past and the past perfect tenses? Like most, you will forget most of these pieces of information, but learning them typically imparts benefits long after the details are lost to time.
I am guessing your kid is fairly young from your example. You asked why it’s important to teach someone the names of the most popular trees in their area. For young kids, it’s important to get them to appreciate that there are many other people attempting to understand, categorize, and identify things in this world for our collective benefit. Kids need to understand that trees are not just “trees”, but that they have different needs, uses, names, characteristics, etc. It gets them to appreciate their role in the world, and the vastness of the world we live in. Furthermore, it makes the start to appreciate detail and nuance, and how to differentiate seemingly like things. Lastly, it teaches them how to find out information, and answer questions. There is also that chance that it sparks a lifelong interest in trees and nature.
Additionally (and maybe most importantly), your daughter needs to memorize these things because the person in charge told her to. Frankly, one of the reasons why are education system is sub-par is because there are too many parents making excuses for their under-performing kids. It’s not as if the teachers asked her to memorize a string of random numbers to be cruel. There are perfectly understandable reasons to teach such “trivia”.
Besides, did you ever ask the teacher why they were leaning this before you wrote it off as a useless exercise? The bottom line is that one of the best and most useful lessons kids are taught in school is to follow directions, and do as you are told (obviously within reason). The fact that your kid failed to do so is the problem, not that what she was told to do is too meaningless (in your estimation) to bother accomplishing.
Look, if you really think there is so much trivia being taught, what are you doing about it? How many board meetings have you been to? Regardless of what you may think, the vast majority of people in the education industry (from teachers to administrators) are not just trying to fill your kid with trivia. They are (by and large) smart, educated people who put a lot of thought and care into utilizing the limited time they have in the classroom to effectively educate and socialize your kid largely for your benefit. Yes, they make mistakes, but I think one’s default stance should be to defer to their perspective on things rather than excuse failure.