Not sure where to start here:How about looking at it from this perspective:
Among the last 20 champions, there are only two instances where a team won a championship WITHOUT spending any time in the bottom 5 of their conference in the preceding 10 years. Those two are 2014 Spurs and 2011 Mavs.
- Even the Celtics who uniquely cashed in big time on the picks of another team finished 12th in the East in 2013-14 with 25-57 record
- Nuggets were in the bottom 5 three years in a row from 2013-2016
- Warriors were dead last in the West in 2019-20 and before their dynasty run they finished bottom 5 three times in a row between 2009-2012
- Lakers finished bottom 5 FIVE years between 2013-2018, and they also finished bottom 5 once (2004-05) before their previous championships in '09 and '10.
- Bucks finished bottom 5 two times 2013-14 and 2015-16 seasons
- Raptors spent 3 years in bottom 5 between 2008-2012
- Cavs I probably dont need to detail
- Miami finished dead last in 2007-2008 and before the chip they won in 2006 they had spent 2 years in the bottom 5 from 2001-03
- Celtics won in 2008 with a bunch of FA's, but they still had spent 3 years in bottom 5 in the 10 years leading up to 2008.
- Pistons had spent 3 seasons in bottom 5 in the 10 years leading up to their 2004 championship
- Spurs I also dont need to detail, as their case of acquiring Duncan is rather famous. Funny part about it is that the 10 year window I set here covers 4 of their 5 championships.
So in light of those details it would seem that 90% of champions tanked or at least were in the bottom 5 for some period of time (usually 3+ years) before they built up their championship winning team. Some used their own draft picks, and some used the talent they acquired as assets (Lakers being the most blatant example of this).
- You seem to be moving the goalposts. My argument was about bottom-5 league finishes (since I think that's what most people around here would argue is a proper tank). Now you're saying bottom-5 conference finish (this encompasses several of your examples -- esp. Denver, Boston, Toronto, Miami a bit). We finished bottom-5 in the conference the past two years. Are you arguing that we're good to go now?
- Are you arguing that drafting Wiseman is what put the Warriors back on top for their most recent championship run?
- You seem to be arguing more from correlation than causation at some points here (Warriors, Bucks, Raptors perhaps being the best example). Are you arguing that it doesn't really matter how good the player obtained in by drafting with a bottom-5 finish is (or whether that player is even on the team any longer) -- but rather the simple fact that they spent time in the bottom-5? Or are you arguing that picking Michael Beasley and Jabari Parker at #2 after bottom-5 finishes were the (or even one of the) key reasons the Heat and Bucks subsequently won championships?
- I think I acknowledged the role of the trade for Ingram for the Lakers in the OP (at least I meant to, and should have if I didn't). I certainly mentioned the issue with Cleveland (got their second-best player directly as a result of their bottom-5 finish). And I very definitely acknowledged that the 2003 Miami example was the single example since 2000 that worked out the very best (drafted player became the best player on the team's championship).
- For the Celtics, they only had one bottom-5 draft choice from those years you mention. That turned into Jeff Green, and then Ray Allen in a trade. He was their third best player (though admittedly important) for their championship. That's why they didn't get mention (the ideal goal is to get something more than a third-best player as a result of tanking).
- My time period was not championships since 2000, but draft picks leading to championships from bottom-5 finishes since 2000. Thus Detroit and SA weren't included. Their key picks came pre-2000. @NUMBERICA raised the valid issue that maybe that's cherry picking too much, but I hope I've raised valid issues in the posts following for the argument that if we can't find an example of a best-player on a championship with the same team drafted off a pick since 2003, then maybe the league has changed from what it was in the earlier period.
A reminder: I am NOT arguing that a bottom-5 finish can't have some benefits for a team, sometimes fairly significant benefits. It does. There are lots of examples. I'm only arguing that the recent history of the NBA seems to suggest that those benefits have been less than what our dreams our for our own bottom-5 finish(es) will be. (If you read Andy's and Sarah's tweets, it seems the Jazz fully intend to do this again next year.)