What even is the purpose of all those non melee/blm jobs?

[Tiramu]

35% is half now? Weird

Okay, you dont speak Japanese do you? You've misunderstood your own link.

He says that more players are engaging with hard content than a lot of players think. Around 50% of players engage with hard content with around 30% of those completing.

He isnt exactly clear in the JP but it reads to me as though 50% have a go, with 30% of those who attempt hard content actually completing the series. This would more or less agree with what I posted.

He also goes on to say that around half the playerbase are casuals who only engage with the MSQ alongside some other content such as a little crafting, roleplay or extremes if they are invited to do that content (ie by their FC).

The 50% you're pulling up is engagement, which means only half of the playerbase even attempt savage or higher on any level at all.