Yoshida wanted to create content for so called casual players, and so called hardcore players. So there is both content, and this problem comes where people hit the wall of hard content, and don't realize it isn't made with them in mind. There are players who want all content to be accessible for them, which conflicts with this idea and causes further conflicts when they force themselves into groups and drag the team down.

It sounds harsh but for a lot of players it is really enjoyable and refreshing to have content this unforgiving, and this should be respected. It would be very smooth and drama-free if players realized their own limitations.