Yeah that's different than tanking I think. Making moves for the purpose of rebuilding/reloading is fine. If you win fewer games as a result and get a better pick, that's an added bonus but it's not the purpose of those moves.
Making moves just for the purpose of losing games is tanking. Sitting good players out for no reason other than to lose is tanking.
So Ainge traded Gobert and Mitchell before the season starts - and according to you that's not tanking.
Then during the season Ainge trades Conley and Clarkson to lose more games - you're gonna say that's tanking?
It's the same part of the WHOLE PROCESS.