Because Holbrook has history of improving sides, getting results and winning. Done it in the juniors, lower grades, and England...now imo he's going to do it in the NRL and has made a promising start with the Titans.
When he rocked up the the Titans he absolutely SMASHED the senior players and scared that fatty Boyd so much that he retired. Identified a player like Fogarty very early on in pre season and made him halfback..turned players like Taylor, Proctor, etc careers around and has them heading in the right direction. These are just a few examples of things you want to see from your coach and his staff.
Obviously the real test will be in a season or two like previously mentioned, but so far so go nood. He has also managed to rebuild key areas of the 17 within a season via recruitment and development of players that we're widely considered shit by many.
On Fifita idk, personally I'd probably have a melt down if we signed an edge forward on his coin like mentioned...but hey, they didn't want to match our offer to Thompson so what does that say?