It states that ISTPs are stubborn. I personally prefer the term resolute. I agree that we are generally easy going. And, really, I do not see that the two are contradictory, much less mutually exclusive.
The INTJ paradox- not to say any of these are exclusive to my type, but I can certainly identify with everything on this list. Except being early. If I don't wanna get there first you better believe I'm late. // The INTJ is strong with this one 😂