I am curious about how many people you have met in these fields. Or is it a general impression based on existing prejudices?
Among the biochemists whom I know, the ISTJ in the lab next door and the ESTJ in my lab are the most competent people I have ever worked with. They are not only good at what they do - they're also very interested in how things can be improved (but their first tendency is to rely on the old method). Being innovative may not be their "innate" way of processing things, but they're a hell of a lot better at it than some of the supposed intuitives I know, who just go off on all tangents with no focus (and therefore no result).
I am also curious how you managed to distill sensor types in science down to "med-school wannabies [sic]" or people trying to conform to their families. Neither of the SJs I listed as examples above are in that category, nor are many of the other SPs and SJs I know in the department.
Undergrad biochmist, grad school biophysics, four years in lab in biotech and two years in technical marketing.
Advanced studies-grad school-extensive interaction across med school, chemistry, biochemistry and physics. almost everybody is a strong NT. The one ESTJ I knew had a stellar PhD dissertation but was hated by the whole department for being pushy and self centered. He went to law school, finished top in his class, and makes a lot of money now. I dropped out with a MS. I'm a feeeeelllerr. I kept distracting the others and they could hear me on adjacent floors.
In RnD biotech-For fun we all took the online mbti-all the chemists and biochemists in the RnD building in biotech. Keep in mind the high numbers of PhDs in RnD. 35 NTs, 1 NF, 2 SJs and 1 SP. The SP bcame a stay at home mom, The NF (me) went into marketing, one SJ moved into oracle data analytics, and the other is by far the worst research scientist I have ever seen. She has cost us so much money becuase she cant ever think outside of the box or accept others interpretations of data. Totally useless. Lab techs tend to be more diverse type wise than scientists and directors given the lower level degree.
Outside of RnD, and in manufacturing, QC and QA you have much more type diversity. Almost exclusively BS degrees. We serve a mixed clinical/life science market so have a very heavy load of med techs who are almost exclusively ISTJs. NPs would be the worst med techs EVER. On the manufacturing line and in QC are happy SJs, and a type mix of other unhappy med school wannbes who didnt make it. They typically last a few years and find other stuff to do that makes them happier.
Our QA department is exclusively ISTJ, with one odd exception, an ENFJ. WTF? he is really nice but sucks.
sales and marketing is exclusively P, about 90% ESTP. We need more long term vision here.
My guess is that your SPs and SJs are BS lab techs or the exception rather than the rule. If you think your whole department is SP/SJ, then you are mistyping them.