YMMV
My kids took the courses because they wanted to. They chose the EC’s that interested them, whether or not they were “stars.” Some other parents even thought I was crazy to allow my three season athlete to participate in sports when others were obviously performing at a much higher level, but I was ok so long as grades did not fall below a B and the coaches seemed reasonable.
We did not even begin to think about colleges until after junior year was over and test scores and grades were in. Even so, one did not end up applying to a single “top 20” school (visited a few, did not like them), and ended up going to the least selective school on the list, although for a challenging major in the honors college. And this was still a research university within the “top 80.”
They wanted to learn the material in the classes, heard good things about the teachers, and liked the idea of having classes with most of their friends, even though some of these (but not all) seemed unduly obsessed with college rankings. They each found a couple of their AP’s kind of boring, because they learned quickly and/or had a good background in the material, and their teachers were happy to quietly provide optional work to supplement.
Many students, including my own, participated in academic competitions that were much more challenging than classwork or homework, for the added stimulation and socialization.Everyone did not get a medal, or did not get a medal every time. Other classes were more challenging to them and in a few cases they were pleased to get a B and qualify to remain in the top track the following year.
Whether they will end up “getting ahead” in life, who knows? Both have had ups and downs since graduation, that had nothing to do with their quality of work or work ethic.
But this was several years ago, and I will confess that if I were a parent of a college bound kid today reading this forum, I would be persuaded to become more rather than less intrusive in the college selection process, leaving much less up to luck and happenstance, and would have helicoptered much, much more, mostly by using tips learned on this board and relaying them to my kids.
I do think that there is the sense that education and employment have become more competitive for “regular people”, that destiny is written in stone at a younger age than previously, and that it has become tougher to recover from set-backs if not merely more expensive, and that this drives some of the urgency.
For OP - at the end of the day, you know your kid best, and at least while she is under your roof you should have a good sense of whether demands are not reasonable, and whether the solution to her high stress level is to dial back the demands or encourage her to learn better coping and perhaps time management, or a little of each.