I do agree with you here, and think the only thing that makes Buick a "near luxury" brand is the name. In many cases, XLE/Limited trims of the Camry, Avalon and Highlander are probably a little nicer than the LaCrosse or Enclave. Toyota is a traditional mainstream automaker, Buick seems to be clinging onto it's glory days of making higher end cars, but the reality is different.
GM, in general, is really guilty of photoshopping press interior pictures so badly that they almost look cartoonish. It also sets you up for disappointment once you're there in person. I saw and looked into the new LaCrosse interior in LA - same overly high gloss wood, flat door panels, cheap corporate steering wheel, etc. However, that works for some people, and to have a "Buick" is hoity-toity-er than a Toyota.