Satoshi from the beginning hid behind pseudonyms, not out of fear of fame, he probably already knew what this would turn into in the success we see today. So he probably did this to protect the system, himself and the people around him. Fame in itself is not a curse, it is just recognition. Now when we are talking about someone who made the biggest financial transformation in the world, it is simply logical to think that there would be huge retaliation if their identity was discovered. so the probability of him having gone into hiding for fear of retaliation is greater than that of fear of fame.

note: sorry if I didn't understand your point correctly, I'm still learning English and I could have interpreted it wrong too.