Very true.
When I was a senior in high school, I had a wrestling match against a kid that I later learned was a national level judoka. (there were some very good judo players in my area) I think he tried the sport for about a month. Unfortunately the month he tried it, I ended up up being launched and knocked out cold. I had to be semi-carried to my bench. I had no idea where I was... actually I KNEW EXACTLY where I was... but I was wrong.
My coach loved me and was a great coach and person. He had me wrestle the next dual, 90 minutes later. I lost to some shmuck 7-6. My coach was a d2 college all-America nose tackle and a d2 national qualifier. He was old school, and we didn't know any better.
This was almost 40 years ago. I don't remember any lasting side effects. I still qualified for MENSA lol. I ended up having a life changing senior year, that was great for me as a person, a wrestler, a student. Many of the best things in my life started with my senior year of high school wrestling.
If I were a kid today, I would have been held out for the season and wouldn't have had experienced the tremendous growth that I got from that senior campaign (despite an 0-2 start).