If possible, you should provide screens of the areas that you are modifying. Might be something that someone can see that you are missing.
Also, what version?
Thanks! 
That is a rather blanket statement that doesn’t really make sense unless you apply it to a specific use case. For instance, if you wanted to emulate No Man’s Sky or Minecraft, then you would not necessarily be wrong. But there are many uses for procedural generation beyond that, so don’t paint yourself into a box for no good reason.
In my case, I can go through about 2 billion iterations in blueprint in about 30 seconds which is enough to make a good 5000 tile map with simulated tectonics and weather that players will use for many hours.