It has nothing to do with knowledge about basketball. Clearly, everyone involved at any significant position in an NBA team knows a lot about basketball.
I don't know about other people, I just know what I want, but I want a team that competes and tries, I detest tanking, both because it's detrimental to the sport, but also because it takes away years of interesting NBA basketball.
I don't live in the US, so I haven't seen a lot of games live, but I have a brother in the Bay Area (already a Warriors fan before he moved, actually), so I've been to three or four GSW games. One was against the Hornets in the tanking season when they narrowly avoided giving us the Harrison Barnes draft pick, and that game was _terrible_ to watch. There was hardly anyone involved, from players to fans, who wanted to win. I don't give **** what anyone says, that's terrible, terrible entertainment.
Maybe we should, maybe we shouldn't. Lots of teams have attempted what you preach, and some of them succeed, but the majority do not. Instead, the Jazz have stayed relevant (and in Utah!) for all these years, while the teams like the Kings are not.
Well, that's like, your opinion, man.