Stars want a shortcut to a championship. Going back to the '80s, most championship teams have two or more players with generational talent on their rosters. It's hard to develop it organically, so modern ball players are collecting where one or more already are on the roster. LeBron got with DWade along with Bosh. San Antonio won with Duncan, Ginobili and Tony Parker [[and earlier with David Robinson). KD signed with Golden State, who already had three of the top 20 players in the league. Philly is being discussed because Embiid and Simmons look special early in their careers. And also because they have so many guys on their rookie deals.
Right now, Wall and Beal are not in the All-Pro discussion. They're very good, if not great. If either was great and Washington had available loot, players would be giving them a harder look. Putting so much of the salary cap in very good players doesn't leave enough left over for a great one or two. That's why I said you have to get lucky in the draft if you're going to make the leap to the next level.