I think this is right on the money.ENTPs don't waste time thinking about other people? Here we are discussing this on a typology forum...?
I assume this must be deadpan/subtle self-mockery for the self-centered attitude ENTPs are sometimes known for?
I'm frankly a little confused.
This is a nearly ubiquitous mistake regarding ISTJs! They're just risk-averse, not mindless tradition zombies. Their Te dislikes tradition when it gets in the way of completing measurable goals just like yours does--the desire that everyone mistakes as "staunch traditionalism" in Si is actually just cautious risk-aversion. (btw, in my experience most arbitrary insistence on tradition for its own sake comes from the more emotional Fe...you'll hear a lot more arguments on purely traditionalist grounds from SFJs than you will from STJs, for sure!)
ISTJs above age 35 or so do seem to have more of a traditionalist bent, but that's because they weren't raised in the information age.
Since the dawning of the internet and the vast wealth of knowledge it provides almost instantly, Si's need to be prepared by knowing all about the standard methods and having a detailed plan gains enormous advantage and no longer has to stick to "tradition" just to be safe.
In truth, it's a big misconception that SJs are inherently traditional--they're not; they're just really cautious, and before the information age following tradition was just the only realistic option for maintaining long term stability through a cautious and measured approach.
THIS is what SJs value, not upholding stupid traditions and arbitrary rules for no reason. Most of the ISTJ profiles floating around are just outright wrong.
There's no such thing as "polar opposite" temperaments; that doesn't make sense because Keirsey's temperaments aren't linear across the same MBTI stats. Two of the SJ types share a Thinking preference with NTs, and for two of the NT types (INTJ/ENTJ) it's actually the same one (Te.)
ISTP is more likely to confuse with INTP, and ISTJ more likely with INTJ. The function that relates each of these pairs is Thinking; Ti for the former and Te for the latter.