why during cutscene its always like this ... (small spoiler)

[Kaisha]

and with the technology we have today, making kind of different class cut scene isnt much of a problem (many game already have this, why not here ?)

Because it's five races across 14 weapon types as well as varying heights they'd have to account for. It's not feasible from both a directing and animating (and armor-clipping) prospect.

It's one of the reasons XI focused around the heroines of their stories and not the adventurer, so they'd fill that role in for you rather than you feeling helpless as the chosen one.