There's many reasons why he would have went I reckon.
Newcastle is big fish, small pond scenario. Now he gets to really join the big leagues and be part of that Sydney / Bondi lifestyle which would be so appealing for a bloke like him. Oh and the Roosters generally have great success.
The most disappointing thing for me is we're meant to be building towards a better squad. He was part of that journey to making us a better team and now we take yet another backwards step and quite possibly head into 2024 with Marzhew, Tuala and an ageing Hunt as our top choice wingers.
Good luck to him. I don't know what efforts the club went to, to keep him, but in a way I'm glad we didn't blow it all just to keep him.