> In my opinion the third in particular needs substantiation.
Fair enough. Exhibit A would be the AAUP's report on BYU's academic freedom¹ (BYU - Brigham Young University - being the LDS-owned-and-financed university system, aimed specifically at Mormon students and faculty). Money quote:
Many faculty members shared in some detail the narratives of
their problems with academic freedom, reappointment, promo-
tion, and tenure, frequently producing documents but asking
that their names and identifying circumstances not be included
in this report. At least two cases are in litigation against the uni-
versity. Some cases involve issues of personal conduct that are
under investigation and others focus on academic research that
raises concern with the administration. Several creative artists in
different fields told of pressures to alter works to meet unclear
administrative agendas. The ability of faculty members to leave
BYU after many years of service is impeded by a non-portable re-
tirement plan. Numerous women, some in groups and some
alone, spoke to the investigating committee about the hostile cli-
mate for women on campus. Many expressed the view that single
women and women who want professional careers are under sus-
picion by the administration and the LDS Church because the
Mormon Church considers marriage and family the first duty of
a woman.5 Overall, faculty members described an intensified
pressure in recent years for a rigid orthodoxy and active interfer-
ence by Church officials in university business to the detriment
of faculty morale.
And bear in mind this is a university (or more accurately three universities, though the report predates BYU Idaho transitioning from a junior college to a 4-year university, which is likely why only BYU and BYU Hawaii are mentioned). If even the Church's own university prioritizes Church doctrine over free thought and academic integrity, then the Church itself - and the various stakes and wards thereof - is unlikely to be much better.
On another note, per your second source, the "61% vs 50%" only pertains to individuals with "at least some college education"; the percentages drop to national averages when you look at actual graduates (18% of Mormons, v. 16% nationally) or those with post-graduate education (10% of Mormons, v. 11% nationally). Not that college education is really a reliable proxy for rational individual thought anyway (lots of smart and rational people didn't go to college; lots of less-smart and/or less-rational people did).
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¹: https://www.aaup.org/NR/rdonlyres/27EB0A08-8D25-4415-9E55-80...