The main difference between Jaylen Brown and Damontas Sabonis is rarity.
Every year there's always a 6-6 or 6-7 player in the draft that has star potential.
But it's not every year that you can find a 6-10 or 6-11 player with star potential.
There is so much wrong with this statement.
A) Its gonna be hard for Sabonis to be a star player given his defensive weakness. Almost every star big man has defensive ability, you have to reach such an absurd level like Jokic or KAT offensively to be a star big man I you can't defend and even with those guys it will always be a liability to their team (KAT could still get better). I would say that Sabonis doesn't have star potential.
B) The above may be true, but if you actually look at the number of star (and potential star)wings vs bigs its pretty close. Not including guys drafted this year....
For bigs theirs KAT, Embiid, Jokic, Davis, Gobert, Ayton, Giannis, Bagley, Porzingus, Collins, Turner, Markenen, Jackson, Vuc(borderline), Horford, Aldrige, Blake, Love,
For wings you have Lebron, Kawhi, George, Butler, Thompson, Doncic, Tatum, Brown(maybe), Middleton(Borderline), Gordon(maybe), Derozen(meh), Harris, Ingrahm
I compiled this list by going through the top 50ish nba guys n si's list, Ben Simmons and Siakim are debatable give that they are "big" wings. The point is if its so much easier to find wings you would expect there to be more wings than bigs. Wings are rarer.
*Please no posts say "You missed this guy!" I might have missed guys, unless you have a half dozen 6'6-6'8 guys with star potential I missed it doesn't change the point.
You're missing the point.
The point is most human beings are not 6-10 or 6-11.
What I'm trying to point out is there are more good 6-6 to 6-7 players than 6-10 to 6-11 players every year.
Just look at the draft every year.
I'm not pointing out how many there are in the NBA, I'm pointing out that every draft there are lots of 6-6 to 6-7 players who have star potential.
If Jaylen Brown has superstar potential then no way the Celts trade him.
And like I said, if Brown agrees to a 4-year 100m deal, Celts should keep him.
There's just no way Jaylen Brown is a 30m per year player, no way!
So if Brown and the Celts can't agree on an extension, it's very obvious a team will offer Brown the max in the summer of 2020.
Ainge and the Celtics will be crazy to pay a player who only averages 13-14 points per game 30m per year.
The problem with your theory is that the reason bigs are more valuable is due to defensive importance, not an offense, and Jaylen can defend bigs better than Sabonis can. If it came down to one play and Al Horford or Giannis or Vucevic or even Embiid has the ball on the block, I'd rather have Jaylen covering him instead of Sabonis.
Jaylen has never successfully covered any of the bigs you mentioned.
I have seen Semi Ojeleye successfully containing Giannis in the 2018 playoffs, but not Jaylen.
Brad Stevens has also not used Jaylen on Embiid.
Same thing against Orlando, Brad didn't let Jaylen defend Vucevic.
So saying that Jaylen can cover bigs is simply not true.