Interesting that you state Isaac Newton's attitude as fact. When I Google "isaac newton universe built for humans to understand" unquoted, I don't find any support for this statement. In fact, this thread ends up as one of the top hits.
>"Newton refashioned the world governed by an interventionist God into a world crafted by a God that designs along rational and universal principles.[55] These principles were available for all people to discover, allowed man to pursue his own aims fruitfully in this life, not the next, and to perfect himself with his own rational powers.[56]"
https://en.wikipedia.org/wiki/Religious_views_of_Isaac_Newto...
You can also read his principles of philosophy and general scholium to get an idea of his views. You will see he believed in a creator that made the universe as simple as possible: