Yep. That puts Adobe in a bit of a bind; if they try to trim those features out of Adobe Reader, the few clients (relatively speaking) who rely on them would have a big problem. But by including them in Adobe Reader, they make a bloated mess that's hard to keep secure.
I wonder if it would be worthwhile to make Reader more modular, and allow people to download a "light" or "full" version, though I suspect Adobe sees third party programs like Preview and Foxit as filling the "light" niche. Since they give Reader away for free, I can understand not wanting to devote a lot of engineering resources to maintaining multiple different versions with different feature sets.
