to make a comparison, a college or pro football coach used to have to deal with an incoming crowd of kids who had played a HS wishbone or veer or one WR offense.
you now have kids playing pro-set offenses. the college can then run a pro set offense and the kids aren't clueless nor is recruiting for such a system guesswork.
the one thing i'd say is there are naivete and blindspots to that in team sports. i feel like soccer defenses have gotten naive and worse. but most schools play attacking soccer and are better at it than my generation.
track being different because there is a more obvious choice-result linkage with things coaches are trying. you can see the times of the recruiting class, you can see their times in college, you can see the improvement or not, you can see how competitive the team is, and you can link that to training choices which can be made on purpose ahead of time. i think very few athletes would have known what they were getting into before these days. i think a lot of us had football coaches in HS or coaches with a crude sense what they were doing, which could only be gotten from a book or a discussion. now it can be serious, technical stuff. specific plans. with an idea what they produce. perhaps some research done about them.
also with video and monitoring, it's not just something you saw and noted at the meet, like they can break down a race dozens of times after, they can look at vitals and measures. they can get 200m splits they don't have to personally take with a watch and a pad.
i also think some of the "shoes" obsession misses that decades ago your school might have offered generic or offbrand cheap equipment. you're acting like it's literally the tech involved when some of it is that these days if a kid wants it his school may hand him copa soccer cleats or nice nike spikes, which my HS didn't do, you had to buy that yourself. that is a subtlety being missed.