Yeah right, well, that makes sense. Again, I don't know if that will help or not. I just don't know. I don't disagree what he and his team are saying, and or thinking. It's a very legitimate take on it.
Gaining too much weight too quickly could leave him susceptible to injuries, and also not gaining extra weight bulk might too. Freaking tough to answer, but due to his height, fluidity, and all that, I think I lean towards their approach could be the right way to go.
If it was up to me, I think I'd just prefer he work on getting stronger without adding much weight.
As an example, I haven't followed Giannis closely these past few years, but he seems to be getting more injuries and playing less games per season than he used to. Not sure if his added bulk has anything to do with it or not, but without really following what his injuries are, he seems to be less durable these days.