@Nick_Asano You have to realize the Beatles were completely unprecedented in the history of pop music. They got hugely popular, yes, but they did it by being genuinely talented and inventive songwriters. They were a different breed from bands like BTS (which were around back then too) who had songs/image/everything determined by committee.
The closest analogue to The Beatles recently would probably be Radiohead.
https://www.youtube.com/watch?v=pHNbHn3i9S4
That came out in 1966, and needless to say it was unlike anything most people had ever heard.