^ This. Players are terrible at judging the skill level of the playerbase. We don't have the data necessary to do it well (because we don't have attempt vs clear rates across the entire playerbase), but we try and do it anyway and the result tends to be not pretty. You see the same thing in the other direction with high end players that insist they're average. No, no you're not. Not even close. It's a skewed definition of "average" that uses the forums and the savage data on FFLogs, ignoring that most of the playerbase doesn't exist in either of those things.
The other difference is that we want content that's fun and challenging for us. That's going to vary from person to person, but we're very good judges of what is fun and challenging for us individually. SE has to cater to as many people as realistic to make money. It's a very different thing than a savage raider saying "stuff is too easy."