Curation is more than possible no matter what volume of titles there are. Review sites, recommendations, etc. are good places to start. I would rather spend 10 minutes for every book I read verifying that other people enjoyed it than one single book anywhere be judged unfairly just because the author is bad at dealing with publishers, or the book contains content that publishers would see as obscene or offensive, and is thus cut off from ever being read by a stranger.
Books that very few people enjoy are also going to be a lot rarer (even in digital copies) than books that many people enjoy. The creme of the crop is always going to be made pretty obvious.
I know this will sound really condescending, but you can sort entries by highest ratings on any good website. You do not actually have to browse through every single book ever made.