Exactly. Most stuff that's made it through the tire casing will easily deal with your tube next, whether it's standard, light, or ultralight, unless you've got the mondo-thick "thorn-proof" variety.

I usually opt for the lightweight ones on my daily-driver road bike, and the ultralight butyl (Continental SuperSonic) on my raceday bike. I'd use the SuperSonics for daily use but (1) they're really expensive, and (2) the thinner rubber IS more difficult to patch, and unfortunately my routes have more than their fair share of broken glass.

Performance-wise, I do think the ultralight butyl tubes are worth it for raceday. My club insisted that I race in the Masters state RR championship, instead of just marshalling, so after dangling a 3-man break in front of the peleton for 25 miles, I ended up outsprinting the last survivor by less than half a wheel. He was coming by, but not fast enough.

Tubulars? Oh sure, if I owned a set of Zipp 202s, that would've been a great wheel for the race. Want! Cannot afford. Superlight tubes, yeah I can afford those.