I saw the Beatles perform at Olympia Stadium in September 6, 1964 in Detroit.
They had opening acts, of course, but then a succession of DJs of local radio stations speaking for one or two minutes each and who each seemed to be the last one. The crowd was restless and finally the Beatles were introduced.
People were much nicer back then but a disappointment over the Beatles wouldn’t have worked out so well even then.
Noooooo!!! Probably would have been very bad!!