The reason you see a lot of "deity is too easy" comments is because Civ 6 offers less challenge than Civ 5 which in turn offered less challenge that Civ 4. The original Civ 1 was tough at the upper levels, but in response to some players complaining that the top level wasn't hard enough, Sid added "Deity" level to Civ 2 to cater to people who wanted more of a challenge. Being able to appeal to people who enjoy playing at Prince and people who enjoy playing at Deity has always been part of the genius of the civ series. Some people, myself included, are disappointed that the current dev team has stepped away from that philosophy.