Eldritch Horror is a game that can be played solo, if you prefer that sort of thing, which is one of the only things that bugs me about it.
If you can play a game by yourself and have mostly the same experience, then it leads to the question, “then why do the players matter?”
This is a question I always ask myself when playing co-operative games, and I think from that perspective, co-operative games are simply a double-edged sword in that respect.
Reading cards in spooky voices or in a faux-serious tone does not a good story make when you’re by yourself.
White clad men and padded rooms may ensue if you’re ever caught. Still, if you’re looking for a story, this is the board game equivalent of reading a story, and your characters are the ones telling it, whether you do it alone or with friends.