We only "kinda" agree because we like each other and know that the other person is wise. Sure the Beatles put themselves in a position to be heard, of course they booked the show, they practiced, they believed, they wrote songs, they had thoughtful life experiences -- but I bet too, as luck would have it, Epstein was in the right mood, in the right place, in the right time, and was ready to have his mind blown and throw his life into helping the Beatles. If Brian Epstein had promoted the brilliant The New Green, you might have been on Ed Sullivan too or David Letterman or wherever, but he didn't stumble into your concert and things took a different path. Chance or luck or fortuitousness or coincidence or magic (OK, not magic) always helps -- but there's no replacement for DOING THE WORK, and making a life for yourself that does not depend on chance. My current new employers ONLY found me if it hadn't been for a coincidental set of parallel (theirs and mine) events - they didn't even know where to look for me or that it was me they were looking for. So the finding was chance - but the bizarre mix of qualifications that prepared me for the job was my own creation over many years. OK are we in agreement now?
We are in general agreement except for one key fact: Brian Epstein would have had a much more difficult road to tow if he were attempting to get tng on Letterman. The Beatles had far more raw talent. Hope all is well lil!