Exactly. Marcus Smart is still an elite defender and very young. You have to have patience with young guards or you end up giving away a Chauncey Billups (7x AS, 3x All-Nba) or a Joe Johnson (7x AS, 1x all-nba). It is not like Smart's salary is killing our cap, he's making less than 3.5m per season. Chump change in the NBA.
However, if we can trade Smart now in a package for an all-star player in their prime, I would have to consider that move. For example, if we can obtain, Butler, Griffin, or Cousins.