The Mavs didn't want a bidding war probably. It's been reported they asked another team with a star and they said no. It was probably Giannis. My only gripe is they didn't get two picks, but I get why that would be a line in the sand for the Lakers.
It's a unique situation. The Mavs like what they built and don't want a pick based package. They wanted a star and AD is absolutely still a star. They got a top 10 player, a great future draft pick, and a good young defensive minded role player who can shoot. The more I think about it, the more I like it for the Mavs. It's bold and daring, something NBA teams severely lack when they just go for massive draft assets to sell a fan base on a future that likely will nev come.
And during the finals Luka was exposed for the world to see and apparently came back from that and didn't learn the lesson.