As a high school teacher, I can tell you that the problem is probably that too many parents believe their kids should be in advanced courses, but they shouldn't, so the advanced courses are getting academically diluted to accommodate a bunch of kids that just shouldn't be there. At our school, half of the 9th grade English classes were "advanced," when it should probably have been no more than 20 or 25%. At the other end, then, the "regular" courses were disproportionately filled with struggling students, which brings the academic expectations of the entire class down. It's a vicious cycle. If more of the average performing kids were in the regular classes, they would raise the academic expectations of the class and everyone would be the better for it. Moreover, the advanced vs. regular track tends to actually be a socioeconomic/racial track in which well-off white kids enroll in the advanced classes (whether they should be there or not) and the less well-off and minority kids (whose parents tend less to be helicopter parents) end up disproportionately enrolled in the regular classes, and then those classes get labeled as "blow-off" classes. That's why our school has done away with advanced English classes in 9th grade everyone gets randomly assigned to a class which will operate with ordinary 9th grade standards. And boy oh boy did the well-off parents pitch a fit over that!
However, if you believe your daughter is genuinely advanced academically, enroll her in as many advanced courses as you want to.