How are guys getting injured a referendum on tanking? It's not like anyone could predict that Jabari would get severely injured and Smart wouldn't.
What I am trying to say is tanking is a HUGE risk. You're alienating your current players, coaches, fans, and management. All for a CHANCE at a once-in-a-generation player. Tanking in itself doesn't always result in the top pick (hello Cleveland). I would much rather see the team put out its best product possible, and let the chips fall as they may. That way instead of relying on ONE player, you have a ROSTER of capable players. Sure the Spurs have Duncan, but outside of him, where did they draft everyone else? How about the Warriors? The Hawks?
Take a look back at the last 20 years '95-'15 - how many championships between those #1 picks? Duncan and LeBron are really the only draft picks that result in championships. Duncan is the only one who did it with the team who drafted him. Granted, guys on their could still win as they are still early in their careers. If the goal is a championship, and tanking is the route that you're going to take, the ONLY acceptable result is a championship. Now not all teams in the last 20 years tanked, but here they are...tell me who was/is worth tanking for?
'95 Joe Smith, '96 Allen Iverson, '97 Tim Duncan, '98 Michael Olowokandi, '99 Elton Brand, '00 Kenyon Martin, '01 Kwame Brown, '02 Yao Ming, '03 LeBron James, '04 Dwight Howard, '05 Andrew Bogut, '06 Andrea Bargnani, '07 Greg Oden, '08 Derrick Rose, '09 Blake Griffin, '10 John Wall, '11 Kyrie Irving, '12 Anthony Davis, '13 Anthony Bennett, '14 Andrew Wiggins, '15 Karl Towns.
Let's ignore from '14 - '15 because it's too early on those guys. Anthony Davis might be the only guy on that list aside from Duncan and LeBron who were worth tanking for.