I do not think we have one good reason why Satoshi should come back because that will be up to him. We can ask him to come back here, but we cannot force him to back here if he does not want to do that. Meanwhile, we do not know who he is and where he lived and we only ask from here. Let us let him do whatever he wants while we can focus on what we did. He will come back if he wants and until that time, we do not have to bother him and can only say thanks to him.
The good reason that many people mentioned is probably just being curious about someone who has such genius creative skills, it's like Satoshi's mystery makes people wonder about his appearance but as you say, Satoshi doesn't want to be bothered and there may be many obstacles in the background between the government and the mysterious groups. Without further hinting about Satoshi's whereabouts and identity is our great expression of gratitude, causing trouble and making the relationship not harmonious can most likely cause him to come up with crazy ways of handlingI believe that Satoshi has always been around using a different Pseudonym or even his real name and is perhaps a public person. We just won't find out who exactly is behind the pseudonym Satoshi Nakamoto. He could be literally anyone in the crypto space. What are the odds that someone who develops the code for Bitcoin then completely stops participating in the digital revolution he or she initiated? Isn't it more likely that he also contributes to code bases for anonymous coins and other stuff he understands well when it comes to cryptocurrencies? I think the only realistic scenario where we could assume that Satoshi completely quit is when he or she was already very old. If that is not the case, I can't imagine how someone in his 40s or even 50s launches Bitcoin and says goodbye.
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