Passing Through (Can't the Future Just Wait) by Kaden MacKay
This song has an important message that I didn't even notice at first but I totally agree when you say this song is relatable. 
I like how the lyrics are very clear and easily understandable. They sharpen the meaning by telling what the song is about from many views which I think is quite rare among songs.
I also think that your analysis is very good and opens this song amazingly. I know this kind of wasting time is personally for me a big problem and it really hitted me when you tell here in your text: "We will only waste more time by focusing on what has already been lost."