IMHO (and I am only a dog on the internet, so…), “take what you’re interested in,” is true but easy to misunderstand.
When I went to an Ivy, a million years ago uphill both ways in the snow, the kids I went to school with were overwhelmingly interested in everything. My own kid, who has no Ivy interests, was deciding between AP Chem and AP Psych, and finally opted for AP Chem despite the fact that she anticipates being a social science major, because Psych is reputed to be easy and Chem hard, and being able to work hard in an environment where everyone else wants to work hard is more important to her than anything else. That’s not the same as piling on APs for the sake of APs, but it’s also not the same as taking on-level classes because you’re not interested in those subjects.