It's all about revenue. If you have a small amount of teams getting in the playoffs some teams are eliminated by mid-June. Then the fans stay home for those losing teams. The more teams that get in the longer those bottom dwellers stay in the race for longer the fans keep coming to the games
Ya they are but some guys won't play. The NBA has already said those who don't play will forfeit their salaries. They are assuming some will not play. What has yet to be determined is how many and who.