It's interesting to compare the mentality of MMA records vs tennis records. You will find all the top players, including the greatest of all time, have at some point in their career lost to an unknown player or nobody. Djokovic, Federer, Nadal, you name it, all have lost to nobody's at some point in their career. True, they play many more matches than MMA fighters have fights in their career. However, this mentality that the biggest priority is to NEVER lose in MMA, and not achieve greatness by beating many great names and winning belts, in my opinion is not justified. Great fighters, and even GOATS, are allowed to lose on occasion to unknown or lesser known names.
That's how I think of it anyway. Same is true of great chess players, or greats/GOATS in any other sport, at some point in their career they have lost to nobody's or lesser players, and it is not seen as some deal breaker for their greatness.. Not sure why this mentality exists in MMA and perhaps boxing exclusively. The mentality does not exist in kickboxing for example.