He may or may not be a drunk. But he's known for drinking 🍻. How many? No idea. But enough to have an effect on his conditioning and that forced Dallas trade him to L.A.
If his conditioning is so bad, why would the Lakers take him? And any other team would have taken him to. If he's top 4 in the MVP race with bad conditioning, that's even more reason to keep him.
The Mavs deny it, but the insiders think the only logical reason is if Doncic demanded it. But still, they could have gotten a better return on the trade from another team.
Nic Harrison is the one with a drinking problem.