none of the twink/twank effort they put out last year.
To paraphrase Red from the movie ShawShank Redemption 'get busy winning or get busy tanking'.
False dichotomy.
Even if we decided to devote all possible effort to "winning" we could end up mediocre for all kinds of reasons.
And even if we devoted all possible effort to "tanking" we could end up with the 3rd or 4th pick in the draft, or even lower depending on how things break.
These are not switches you can turn on and off with a certain outcome guaranteed in each case. We have a GM who understands that, even if other people don't.
TP.
You can only control that which you can control.
It seems to me, a sound strategy would be that you should try to put most of your eggs in the basket you control, not depend on lotteries and what other people do.
Right now we have various 'assets' in the form of picks and young players. We can't control how well the picks of other teams (i.e., Clippers, Philly) turn out and we have only, as you point out, limited control over how our own picks turn out.
We do have some control over the value of our young players. It is in our best interest that those players increase in value as assets -- and that's true whether we intend to keep them or to trade them.
It does not help this team if at the end of next year, the trade value of Sully, Olynyk, Zeller, etc. has stagnated or declined due to having another season where players perform poorly or inconsistently due to injury, imbalanced, wacky rosters, forcing players to play out of position, and to shoot 1000 shots from their 'weak spot on the court' just to 'develop it'.
If that happens again, we won't be able to GIVE those players away. Is that lost value worth getting another mid-lottery pick?
In my opinion, it is in the best interest of the team to try as much as possible to put those players in position to have success, because that increases their perceived value in the league.
Chances are, if those guys have decent seasons, then we aren't tanking. Probably not contending for a title any time soon, but not likely tanking.
There is also an argument to be made that having the team perform at least 'well' (as in compete for a playoff spot even if they fall short) would make the roster a lot more attractive for any potential pending free agents (including Rondo).
As others have also pointed out, both Rondo and Green will be in contract years as well.
There seems to me to be a lot of motivation on the part of both players and team to NOT repeat last year.