The play in games are basically designed to curb tanking, but the Lakers and Nets are the perfect test case scenarios as to why they are doing it in the first place.
For the Lakers, they have no chance of reaching 8th basically, so their season would have pretty much ended at the All Star break. Thats not good for the NBA at all. At least with this play-in, they can win 2 games (Pelicans and then Clippers/T Wolves loser) and make it into the playoffs. Is it fair? Not at all. But its a way to keep interest in the league for the whole season, as well as not having teams just trade players away.
In the West, basically the 1st and 8th seeds are wrapped up. Basically 7th is gonna be Minnesota. So all to watch now are jockeying for 2nd-6th, and there are still 17 games left.