I don't mean to annoy you, but it sounds like it took you 6 years once you actually got a permanent job (although even 6 years is too much!). The years as a student don't really count.
I guess you can say that it really took me 6 years to get a green card via employer sponsorship (although those 6 years were anxiety-filled to say the least). However, if the startup (my first employer out of college) sponsored me work visa and then green card, I would not have gone for the PhD either. I hope it makes sense.