Well, this is like claiming that authors writing in English don't care about grammar. There's too many people doing too many different things with the language -- from texting LOLs to writing academic research -- to generalize. But speaking from experience with one ~5M line industrial C++ codebase continually developed since the 90's, we care enough about quality to have a whole set of measures, automated and cultural, to support it.
We've looked at static analyzers several times but none of the evals have found issues worth the price. It turned up things like a static expression to compute a bitmask where the same flag was being listed multiple times. Which is nice, but made it feel more like a lint tool in terms of differential value added for us. If we didn't have things like valgrind memcheck on continuous integration, it might be a different story.