Changing Villager trades, making Bedrock harder

Changing Villager trades-specifically trying to find a biome for a specific book-is much too difficult for new players, those of us who haven't progressed to Hard difficulty and those who are generally having difficulty/frustrations with the Minecraft game. THREE generations play Minecraft in my house. I am 69 and have been playing for several years, my youngest grandchild is 4 and can watch Foxynotail movies and build his Redstone! If you expect either of us to run thousands of blocks to find a book, we stop playing. Too time consuming, too frustrating to find and too hard. We can pick the world we want. we won't experience the total Minecraft experience because we will only play/choose the limited map with our favorite biome/book in it.   Experienced players online are very vocal. You hear them. Please listen.