I dont think 10 AP exams is necessarily well rounded.
Im not fond of the AP exam method of education. most of them just require alot of memorization and parroting back on a multiple choice exam that is entirely coachable. And pearson even trains the teachers to teach to the test properly. few schools have ap courses that go beyond that. the courses are hard because of the volume of stuff and the speed it has to be memorized. not because the material is hard or advanced.
If you are just going to college as job training, then fine get those credits out of the way as fast as you can and as cheaply as possible.
I would prefer a more robust curriculum of honors classes that introduce and encourage actual interaction with the material, analysis of it and then synthesis and creation of the students own work. a kid that can do that, can tackle any topic in higher education. Then they can go on to create and achieve because they will have the tools for it.
your 10AP kid will get a quick degree in something useful, get a good job with a company and begin paying back their student loans in a timely manner. but will they create or achieve? or will they just fufill a role as a microserf? especially if those 10 AP exams are all they did.
Pearson and the testing industry shouldnt be dictating the education of our kids. but alas, they are.