I hear you...part of it I think may reflect the same forces behind the phenomenon of grade school textbooks always being about 20 years behind...a lot of K-12 institutions don't appear to have absorbed the reality that the post-secondary world uses (assistive) technology as a matter of course. It's not even an accommodation. And flipped and online classrooms, with their online, remote-administered assessments, typically allow a good two-hour window to complete an assessment that could be finished in half an hour by a B student. Since they're remote, they almost always allow open notes and calculators as a matter of course. (They do have checks built in...you usually can't go to another site mid-test; if you do, the test will kick you out and consider the assessment done.) And they design them with internal checks for irregularities. Or to emphasize more applications and problem solving, and less rote fact-spewing.

Perhaps if all K-12 education also emphasized application and problem-solving over rote fact-spewing they would be more comfortable with accommodations...