The first one is best for sorting files because it's basically like a Drive>Directory>Subdirectory structure, which makes things easy to seperate and find in a large amount of data.
Conversely, when you're keeping track of what day it is today, what you're doing this week etc, it's much more helpful to have the days first in mind because they're more relevant for THAT than what year it is.
No it isnt. We arent computers, we are humans. In most uses, the year is the least relevant information for us. The most important information is the day, which should be in front. And computers can be programmed to understand the date in whichever format we want.
If the year isn’t important than why are you saying it at all
Also it’s not yyyy/mm/dd for computer sake, it’s most convenient for humans because it has the most variations. If you’re searching through 100 years of records then finding the year first is most convenient because you’ve ruled out 99%. For computers it doesn’t really matter because they can go through all the data much quicker than we can
How often do you use the year when talking about dates? Does your boss say "i need this done by 2023-12-22"? For day to day use, the day is the most relevant info. The year and even the month is often implied.