Well... maybe folks got tired of bitter, vinegary cider when Beer became more commonly available....
I think there's also a nod towards industrialization... It's difficult to keep a full scale Industrial Cider manufacturing plant running all year... Apples only come due in the fall - what are you going to do the rest of the year.... Compare that with Beer - you can store grain in grain bins all year long - and continue to brew through the winter, spring, and summer.... It's just well suited towards large scale industrial production... and the history of Beer in the USA since the 1800's is one of larger and larger scale industrial production up until the last 10 years or so....
I suppose you could argue that Wineries have to deal with that problem too... but small scale "family farm" type wineries are now just starting to make a comeback in the marketplace in the usa... 20 years ago in the USA - there wasn't a whole lot of commercial domestic wine production in small wineries...
Thanks