Excellent point as usual, Think BIG.
The girls schools that I know into allow students electives so that they can choose what they would like to take for secular studies. (Cooking is an option, and so is useful stuff like computers).
If you want to stop frustration and double workload, the best way would be to teach that perfectionism is wrong, and getting a “B” is good too!
I also believe that there is no set curriculum outside NY & CA (where there are regents which are needed for a diploma), so in Lakewood and out of town this could be helpful. In town you are stuck with the “hard stuff”.