I was a nationally ranked junior squash player and this article is pretty spot on. I loved the game and was more than willing to put in the hard work to be ranked. When I played there were some pretty horrible parents who put a lot of pressure on their kids to win. I was a bit burned out by the time I got to college, but many kids I knew had so much pressure put on them that after college they have not picked up a racket.
When parents ask me about squash and how it can help their kid(s) get into college, they are often surprised to learn the truth. The top ten kids get recruited pretty hard, 11-20 less so, if you are ranked outside the top 20 you will not be recruited. I was ranked in the 11-20 range and got only nibbles of interest from Ivy League colleges. Most of the coaches who contacted me were from schools like F&M, Trinity (this was before they became the powerhouse), Navy, Rochester, Bates, Bowdoin, etc. Decent schools, but not the Ivy League.
I cannot speak for fencing, but a friend of mine in high school was the #1 ranked American junior fencer and got into Princeton early, told me the recruiting numbers are similar. His freshman year at Princeton he was the 5th best fencer on the team. Think about that, #1 ranked American junior is only the 5th best on his college team. That shows that international recruiting is huge.
The article mentions that there is an 88% acceptance rate in the Ivy League for students who are endorsed by the coach. What parents need to realize that translates into two students per coach for niche sports. The #1 ranked kid in the under 19s when I played applied early to Princeton and got accepted with just over a 1000 on the SATs. The #5 ranked kid who also applied early to Princeton was wait listed, the coach wanted to see if there were any great international recruits before he chose him. He was later accepted.
The one point the article misses, parents can throw all the money they want at their kids junior squash. At the end of the day it only helps marginally. The #1 ranked junior squash player, the year after I graduated, started playing at an introduction squash camp we both attended. The day he got on the court he was a beast and was beating players who had been playing for years. In case you are wondering he wen to Williams College. While I was never as good as he was, when I started playing within a couple months I could beat many kids who had been playing for years. The best players are born with the skills and mental aptitude. While there was changes every year in the 10-20 rankings, most years the top 5 players were the same. Had any parent of a kid ranked 10-20 hired a former top ranked professional as their private coach they sill would have never cracked the top 5 and highly unlikely the top 10.