This reads as someone who looks at data but doesn’t actually play basketball, coach basketball or generally know basketball. Numbers can only tell you so much, and 2025 Celtics and the rise of Steph have led to more 3s but the sport of basketball is not as predictable as the author suggests. For example, look at the college game, which doesn’t reflect this trend as much as the NBA does.
I think they are talking strictly about the NBA. College players are much more inconsistent because they're younger and less experienced. There are not many 20 year olds you can depend on to consistently make 3s. There are also a lot more teams which spreads the talent pool around. In my opinion, it amounts to a more exciting product to watch, even if it's less polished.
Unless you have a correctable mechanical problem with your shot, the ability to hit a three point basket is more of a natural ability than a learned skill. Those guys just have incredibly good hand-eye coordination.