I have to jump in. I totally disagree with that comment. There are a mere 32 teams in the league. There are well over 150 valid QBs in the world that could fill those 1st through 3rd string positions. The issue is always accuracy, ability to unload the ball, ability to extend the play, ability to run the ball....and the ability to not panic under pressure. In many cases, the reason there are so few top-tier QBs is because it takes NFL experience to slow down the play and make the right decisions. The NFL is straight-up a mercenary type league and players come and go frequently. They only get limited opportunities to work together and it's a matter of finding timing and route matches between the QBs and Receivers for success. The roster caps, salary caps, contract lengths, and lack of starter injuries is what keeps the employed numbers low...not lack of talent. If there was such a true QB shortage, someone would have picked up Kaepernick by now.
For Biles....that's ok that she had a breakdown. I get it. She didn't have the rest of the team she was a part of 5 years ago and as a result, she was the veteran with the most to lose by not doing well. She's overwhelmed....probably due to the time change, lack of sleep, and time between events. You have one misstep, it's probably closer to the anguish an NFL kicker goes through than a QB. You can't stop the game to have a few practice kicks....you can stretch on the sidelines and have a warmup long before competitions. You are expected to go out on the field and perform. In those cases, if you mess up once, you start trying to fix the problem and can actually end up altering your technique worse.... NFL kickers often miss many kicks back to back as they adjust something that wasn't broken to begin with....
Funny story about me...when I was a kid, I was in a concert band and had to play these really bad crash symbols on a song. The director would point at me and I would crash the symbols together at the peak of the song. They were old, but in practice, I actually crashed them multiple times in practice where they created suction and didn't ring. They just made a clump sound. It resulted in the whole band in front of me turning around and looking at me. I was nervous over this because it probably happened 5 times during practice...including the last time before we performed our concert. Concert night, I didn't change what I was doing. I just relaxed and nailed the timing and the crash.....to everyone's relief. It was funny because I was complemented by my band mates on how it was the best crash symbol performance they'd ever heard. It's tough being in the spotlight for stupid things that really don't matter......but you only get one shot. You just have to crash and go....if they don't ring, drink a beer and forget about it.