Naa we'll see it again. This generation just doesn't think what the past generations did was cool because those guys got dragged through the mud for it (rightfully so). Give it another couple of years, and it will go back.
To dynasty in basketball 2 conditions have to be met it seems.
1.) You have to have a star player, Top 3 in the league
2.) Something absolutely absurd, once in a decade, convergence that no other team can replicate has to happen.
GSW Run- Obviously KD signing after the cap spike, after Steph signs the most undervalued deal in the history of the sport because he twisted his ankle once and everyone hates thin guys that look 12.
MIA run- The best player in the game colluding with his boys years in advance, and leaving his team like it's baseball to form the first superteam via FA
Lakers runs- Shaq bouncing from ORL after his 1st contract, Kobe refusing to play for any team other than LA, the infamous Gasol trade (but but but Marc...). 3 weird, and "that will never happen again" moments
HOU back to back- Best player in the World retiring out of nowhere
Magic years- I mean, the Magic Johnson trade in general
Kareem forcing his way there ect. Getting #1 on top of all of that
Celtics: The Robert Parish trade which ot them a top pick that turned into Kevin MCHale. Getting the best PF and Top 5 center of your generation for peanuts...
The only team that didn't win back to back or dynasty because of absolutely crazy circumstances was the MJ Bulls.
A lot of these titles were won by teams with star players and championship cores getting Top picks and drafting generational talent, or the best players of the decade forcing their-selves to a particular organization.
Right now because of all the reasons mentioned in the OP we haven't seen that yet. LeBron and KD keep trying, and it's been embarrassing for them, but there is no doubt in my mind we will see something like this again.
Someone will turn down the supermax and sign for less than they are worth to play for a team. One of these days these morgaging your future trades are going to look terrible. Imagine if Kyrie stayed and Ainge was actually able to make the Davis trade for example. Someones going to force their way to LA or NY or MIA. Paul George just got greedy, that team easily could have been LeBron, George, and AD.
It will happen, just give it time. Social media has kinda taken the sting out of the spot light focused star, but it will come again.