Rasho was a worse defensive big man than Tiago Splitter and Rasho played in an era where less fouls at the rim were called. He probably deserved the yelling in the face from Garnett for giving up and-1's all the time instead of, you know, blocking the shot or making a play on the ball and getting the rebound.
Rasho was just soft. So soft that he was borderline unplayable in the 2004 Lakers series and Horry and Duncan each had to log big minutes and eventually their lack of depth compared to 2003 or 2005 just wore them down. Kevin Willis was too old by that point, Rasho was soft and useless and Malik Rose was too undersized to handle the Lakers bigs. You couldn't really go small with Duncan at center with both Shaq and Malone out there. Timmy would simply foul out.
I get that Rose was a fan favorite here for a long time, but the Rose for Mohammed 2005 trade won us that championship. We don't beat the Pistons or even Seattle that year with no true center and dawg down there in the paint to complement Duncan. Don't forget Seattle had our number that year big time because of their list of mean tough big guys (Jerome James/Danny Fortson/Reggie Evans) that kept giving Seattle second chance opportunities and they had a lethal offense led by prime Ray Allen and Rashard Lewis that year. Mohammed fixed that.