I cannot agree the use is idiomatic. Too many phrases follow the pattern. An idiom is "a speech form or an expression of a given language that is peculiar to itself" (American Heritage dictionary)
The articles, a or the, can help map contexts.
A. One example of how careful we have to be is when we’re analyzing the carbon dioxide in Earth’s atmosphere ...
B. Because the moon has moved in relation to the Earth...
Example A is an earthling perspective. Example B is a Solar System view.
Similarly, we can be welcomed in the Yellowstone by the US National Park Service (there are many parks, Yellowstone is a national park). We can go to Yellowstone from Treasure, for example (we are not taking other parks into account).
This is not to imply there could be many Earths or many Yellowstones. ;)
If you describe a beginning and an end, you can say "from the beginning to the end", as well. :)
It is good to consider how we can think about language. We do not have to seek objective truths and try to tell what this is we must put in our heads (you are seeking "an explanation").
Someone might say,
Yes, the articles help me map cognitively.
Another person would say,
There was this book and it had the articles this way, and I like it.
We can be better off thinking how we can reckon and what works for us, rather than objectively rules or explanations. There might be no such principles, after all. Grammars books are written by people. :)