We cant really say the Sixers way is the better way until about 5 years from now to see where both teams sit.
the sixers plan seems to be get as HORRIBLE as you can and hope you draft guys who become superstars. Luck plays into a lot of that. Theres a chance Embiid may be another greg oden. we don't know what he will be in the NBA.
Celtics on the other hand have just as many picks, but seem intent on competing and developing assets as best they can. maybe those assets will be used in trades, maybe they will be used to move up in a draft for an impact player.
Considering how poorly the Celtics have fared in hoping for "luck" in the lottery im surprised Celtics fans want them to continue that path. they missed out in the Duncan draft, they missed out on Durant, and they missed out on Wiggins. all in years they had poor records. On the other hand, the only championship this team has had has come from ainge maneuvering his assets into a major trade.
so, I really have no problem with guys like Thomas, zeller, sullinger, olynyk playing well and leading the team to wins because if anything it ups their trade value for ainge to potentially jump on someone much better in the future. theres a better chance of that happening than landing a #1 pick, and that pick being an all-star to lead you to a finals win