(disclaimer: this was not my child, she did not have score out requirements at her gym, thus had none of this type of stress)
I get what you are saying, but honestly, 4 is where all the fears truly start and the mental **** at least looks at the fan for many gymnasts. High bar, cartwheel on beam, two bhs, a vault TABLE....omg...you mean all of a sudden you have to run like hell and HUCK yourself at a table and hope you get over?!
I have seen very scary level 4 meets also...and the jump from 4 to 5 is such a scary jump.....all of a sudden you have flips on two apparatuses, and are doing a complete mindscrew-of-a-backwards-skill-on-beam that shall not be named, but continues to haunt gymnasts in the future. The sport is (just imho, more mental than physical. You could be in Simone Biles shape. Doesn't mean poop if you are Jello pudding in the mindset. I feel the sport has tiers in terms of the drop offs. There are tiers in ages (meaning when girls quit-think 12/13 yrs old in summer), and tiers in levels. Between 4 and 5 is one tier; between 8 and 9 is another. And I fully believe that while they are both rough places, the tier for 4 and 5 is a rougher one because (again imho) it is the FIRST one (I am in no way shape or form saying a flyaway is harder than a bail!!!). Level 5 is when gymnastics really begins to get, er, 'interesting.' We know of many girls who repeat level 8 and are fine with it, because they get it, have gone through the first tier, been in the trenches, and know that it is better to repeat than it is to risk a career ending injury due to being unprepared mentally/physically. But there is a lot of pressure on level 4s to not repeat, because their peers might be moving on, the gym might push those repeaters to xcel when they want to be in J.O., they have seen others have to repeat and those might have or got less coaching, etc, etc. Level 4s know that they are getting close to the 'carrot' of gymnastics, if you will...the flippy things....and the stress those girls put themselves under can be unbelievable. And for many, this stress will create their first 'blocks,' and how they learn to deal with them will determine whether or not they continue in the sport.
Sorry for the rambling (on cold medicine and am wired). But I feel it's a valid comparison.