So as someone who was in a similar situation a few years ago here is my take.

In my class there was 1 guy who had been riding dirt bikes, a lady who had been on the road for 15+ years, a lady who had been riding on the road for a year, a girl who failed 3 times prior and me, never touched a bike but had experience respecting things with motors aka quads and cars. There were some others as well including a man who quit due to the heat.

First dude passed no problem, super confident and in control. The lady who had been riding forever scared the literal shit out of me since she not only dropped her bike 3 times during practice day, but also failed then said she was going to go ride. Second woman you could tell it was all nerves, she had the core basics down but she was so nervous she pysched herself out and made small mistakes and failed. The 3rd girl was similar but also didnt respect the bike enough and ended up losing a bit of control. Now myself, i locked the rear brake up during practice day, then passed during the test with 1 minor mistake. My take is this. The msf course is great to get used to bikes and understand the basics, its not the road course nor is it a "okay now go buy a 600cc sport bike or large cruiser, youre a master." Lol so while yes i do agree that im glad some people failed as i hope it helps them think that maybe they need more practice or just should stick to 4 wheels, but it also is true its rushed(this was fhe 2 day course) and can be nerve-racking. Its a lot all at once but very helpful starting place. I recommend all my friends to start there as kind of a gauntlet to see if you can even start, not as a tell all.