Theory why Ninten isn't in Earthbound

So I played Earthbound Beginnings and Earthbound and I was thinking about why for some reason the events of the first game had no plot relevance to anything in the sequel, despite Giygas' alien invasion in the first game most likely being a highly publicized event. I think that the reason why there's no Ninten or America in the sequel is that they don't exist anymore, because in Earthbound it's shown that Giygas can go into the past, so he probably erased all of the events of the first game in a fit of rage, which altered the timeline making it so America is now called Eagleland and a bunch of other stuff. But I think that becoming the ancient universal destroyer caused a bunch of other timeline stuff like an echo (not exactly them but very similar) of Ninten's friends in this timeline were now the chosen ones to destroy him. I also think that because Giygas was destroyed, Ness' timeline was the one that continued which is why events in that game directly influence Mother 3. Anyway I might be completely wrong but I just was thinking about this as I played Earthbound, if there's anything I missed that contradicts this then let me know