It is if you live in a lightwind area! In the summer here, every afternoon, the wind picks up to 8-10 knots. That's all you get. Getting a raceboard and big kite lowered my low end from 12 knots to 8. This more than tripled the sessions I could get in the summer months.
I take your point - if you live in an area with a consistent light thermal or "sea breeze", having a really low wind option makes sense. Kiting on the Great Lakes, where the kiting is front-based, consistent light winds are not that common (although they do occasionally happen) - more usually light wind is on the way up
, or on the way down