Kids will take multiple APs (taking 10+ isn't unheard of, and in a lot of high schools is expected), do multiple extracurriculars (debate, MUN, DECA sports, academic olympiads, theatre), volunteering (NHS, CSF, etc), and even take college classes in high school.
On top of that while tests are optional, most students still submit their SAT and ACT, and the expectation of 1500+ and 35+ still holds.
And even then there's no guarantee you'll get in.
Most applicants who successfully get into Ivies, impacted majors with single digit acceptance rates at Mich or Cal tier programs like EECS or a BBA, and other peer programs are basically burnt out by 17-18 (the age most kids at these programs now matriculate).
And the first semester is not impactful in any shape or form. It's best to take summary and intro classes as P/NP to even the playing field and then throw in a weed-out class (in CS that was historically data structures or OS).
So many HNers complain about how the younger generation is hyper-competitive yet when universities start taking steps to help reduce that they start kvetching.
Heck, with my profile from the late 2000s and early 2010s (right when everything became hyper-competitive and optimized), I actually wouldn't have a shot at most programs at Mich let alone my Alma mater, especially when I compare it to my younger sibling's profile who also attended a Mich tier engineering undergrad in the 2020s.