It proves none of those things.
Pepe played for Real, won every club medal that could be won in 2 different countries, won an international trophy with Portugal and scored in the knock-out phase of the World Cup yesterday. He is not the goat.
I could probably name some Barca, Bayern or Juve player that's done similar that's also not in the GOAT conversation.
The reason these 2 are is because of their body of work over 15 years and we all know it.