There are other ways to self-rescue, as long as, yes, you avoid the truly hairy situations. There is a small but real subculture of sea kayakers using folding boats based on the old Kleppers. They are kinda broad and VERY stable, so most have never had to roll one. Admittedly, they are more for expeditions than for the rock-gardening you may have seen on videos. (They can carry tons of gear.) I understand they were once very popular for floating Alaskan Rivers. Jettmar mentions them in her book.
Some of the more modern folding kayaks, OTOH, are very sleek and essentially identical to the tippy Greenland-style raceboats in which the real extremists are flitting about. The Feathercraft Khatsalano is one of the fastest boats out there.
Personally, I've never had a good roll, so I stick to the wide barge-like boats... :o)