No James...it is not that silly.

The Tyros3 is a "workstation", according to the definition you yourself posted.

It may not be your cup of tea, but it is certainly mine, as well as many other professional players...it is exceptionally versatile for both live and studio work.

"Workstations" are too difficult for many players (pros included), hence the addition of arranger and arpeggio features.

IMO arrangers are superior to an Oasys with Karma...try playing a polka or an old fashioned waltz, not to mention most other standard styles.

Yes the Oasys has it's place...I've played one...nice instrument, and you're right, it is no arranger....not even close.