Honestly I don't think any actually rational person would claim that sealed/graded collectors aren't real collectors. There's just this pent-up rage at the idea of people who collect purely as investment and I get that, but it might be used a bit too broad strokes at times.
I can totally see the appeal of collecting sealed/graded even if just for the looks. That's a pretty nice looking shelf! In fact, color me jealous of the Quantum Fighter, I love that game!