I think people are more open to considering this after the emotions of the lottery coming on the heels of an entire season of building anticipation. But the reality is that even if we were to have won the lottery, we still have a very, very steep hill and great chasm in front of that still requires a massive amount of luck and perfect execution to get to. That is, if we're talking about a championship. If we're talking about being a playoff team yeah, sure, whatever. But that wasn't the reason we got ourselves into this thing to be a "good" playoff team. But because everyone has been beaten down by the process, I'd imagine people would be thrilled at the possibility of seeing a "playoff" team take place (even with Flagg... lots of teams like Dallas with Luka or current Giannis with Milwaukee, etc.) and fail to realize that the goal posts moved and that team still is far away from championship aspirations.
tl;dr Even if we won this year, we'd still need to hit a massive home run next year, in addition to numerous triples and doubles in the next few years, all without striking out because it's already 2 down.
So while the emotion is allowing people to more clearly see reality, this reality has always been there.