He benefited in terms of winning championships but not INDIVIDUALLY. Without Shaq, Kobe definitely wins more MVPs, scoring titles, etc. Kobe sacrificed some personal glory early in his career to win championships. This is similar to the career paths for KD, Russ, and Harden. When they were all together, they made the finals but Russ and Harden were not in the MVP conversation. They split and now Russ and Harden are the leading MVP candidates in the league and are averaging historic numbers we haven't seen in 50 years. There's only one ball so its normal that if you pair two to three dominant players on the same team they will not have as much success individually as they would apart. Nothing controversial with this claim.
If Kobe played with players like Pippen, Harper, and Rodman in his prime, rather than another alpha male scorer like Shaq, he probably puts up some historic numbers we've never seen and probably wins more than 1 MVP. He proved in 2009 and 2010 that even at an advanced age, he could carry a team to championships without a player like Shaq by his side. So pair him with Jordan's cast and I'm sure he wins championships as well.