Well, the amount of dialogue and characters are enormous, and FF14 is literally having a lot of what it earns being used to make games like FF15 actually exist (in fan-theory) because 1.0 almost killed SE, which is easily supposed with minor knowledge about Japanese business culture and general history. And, this is also something older square fans would enjoy considering VA work is only for important events and has mixed reactions to its existence in cutscenes.

Text walls are just a thing for FF in generaland it would be a complete disservice to FF fans if they cut the dialoge down to be affordable to VA