We have obviously had to deal with much different problems in life. I grew up with my dual for 18 years, then have been with my conflicting pair for 11 or 12 years. I agree 100% an ISTP can suddenly break off a long term relationship seemingly out of no where, but you seem to miss the other side of the spectrum about intentions. This is the little twist that people put on actions and why they do them. This is what I believe drives the ENFP to ask themselves "why"(not always an external why), this is what drives the ENFJ into self-deception. This is what ISTPs look at without asking why. We first analyze the functional or objective side regardless of intention, then we will get to the intentions later. But honestly if the functional or objective side works then nada problema. Live and let live.
My motto would be more along the lines of "you cant argue with what works"
So the lyrics is about getting a person to love the speaker, even if she had to wait for 50 years, kind of like in alchemy, creating gold is an arduous process. I wouldn't say it's a song that's particularly attractive to SLIs as it is SEI. Since only emotional aspects are mentioned, but not concepts. But then, who can confidently say that there is a T/F distinction in love?