I realize sub count is important for an MMO. But what I don't get, is why play something intended for millions of people to play on a relatively safe level at the same time and complain about accessibility?

This isn't, say DMC. Single player with multi player elements. The challenge is there, because it's built that way. This is an MMOrpg. If you think it's too easy, then maybe it's just not for you? 1-50 customer losses over casual content isn't going to matter much against the tidal wave who come for casual content and bunny girls.

Korean mmos are pay to win, you'll have plenty challenge just trying to play the game without spending a dime.