Biome Travelling and Villager Trading

I might see that Mojang wants us to travel every biome frequently and to explore many places, it sounds very very nice, but I think biome-specific trading doesn't fit nicely over this idea. it costs players a lot. Many players (especially newbies) do NOT have way to reach these informations. They wouldn't know where to get mending enchant book or where is swamp biome. This will cause very serious inequality. I would like to have your reconsideration.