Not sure where you learned to calculate odds, but using your numbers...
If 80% fail, 20% succeed, the odds are 4 to 1 against.
If 92% fail, 8% succeed, the odds are 11.5 to 1 against.
Yeah yeah yeah, whatever. I didn't divide it out when I posted, and I just don't care enough to go and edit. But maybe I will.
Still though, you're like my dog when I point at something for her to go get - you're looking at my finger rather than what I'm pointing at.
The point of what I was saying is that no matter how you state the odds of success in this industry, it's heavily stacked against you. Everyone thinks they will be in the successful group, but, at best, cereris paribus, 3 people out of every 4 that think they will be successful starting out in this industry will end up failing.
What you do to be that 1 out of 4, or 20 out of 100, or 8 out of 100 that will NOT fail, is all that matters.