*you* might find them bloatware, but considerably more people use them than use the programs that come pre-installed on a typical Windows PC.
If I weren't about to buy Final Cut Studio 2, I'd have hung on to iDVD and iMovie as an "average" Mac user.
I still held on to iPhoto because for some inane reason Aperture isn't included in Final Cut Studio 2. And iWeb will be useful with my MobileMe account for casual stuff.
Also, by comparison, look at what a piece of junk Windows Movie Maker is compared to iMovie? That thing is a hell of a lot more like bloatware than iLife.