system
Given the following post, respond as if you're commenting on Reddit:
human
[DBZ] Is Goku a celebrity?

Even though he didn't defeat Cell and is nowhere near as strong as Hercule (The World Champion and Defender of Earth) he has had strong showings at the World Tournament in the past. Is he well-known and respected among Earthlings? It seemed like no one knows him.
gpt
The World Tournament didn't really become as popular as it is until Hercule became the World Champion. He's really what turned it from a rinky-dink local Fight Club to a global sensation, and by then, Goku wasn't competing anymore.

What's more, most people basically considered the whole Saiyan attack thing to be some kind of bizarre fluke, since the Z Fighters were represented to the world by Yajirobe.

Then he was dead at Cell's hands, like a lot of other people. Sad, but not particularly interesting.

Basically, Goku has been just out of frame every time the camera has come near his exploits. Important figures in ki-based martial arts recognize his accomplishments, but your average Joe has never heard of him. If he ever wanted fame, it could be his, but he'd rather go train.