How is it the lottery of indie games? All the games sold on HIB - that I've played - are good, original, well polished games. Some, I believe, are some of the best games ever made, indie or non indie. It wasn't luck that put them in the HIB shelf.
There are a lot of really good indie games out there, but most people are only aware of the famous ones, or the ones they get exposed to via stuff like the HIB or high-visibility steam sales.
If you enjoyed the HIB games I suggest you keep digging as there are many, many games out there at the same level as the average of the game in the 4 bundles.