Okay, so 100% of CPAs is what percentage of the general population? (Help me here, my math is weak.)
I think the main issue is that a very large proportion of users can't figure out how to get Word to make tables, so they use Excel for that since it's set up to do tables. So that's the other problem: Word is another overly-muscular application. It does so much more than most users need from a word processor that it tends to bury the more basic and important functions.
But (back on topic) this seems to be the issue with FileMaker. It's vastly overpowered for what most users need from a database, but the only alternative is the completely dumbed-down Bento.
I was also puzzled by the characterization of Bento as a "FileMaker add-on." As far as I can tell, they aren't interoperable at all.
Funny thing is that Word and Excel are bloated for sure, but there's always something you wish it did that it doesn't do easily.