You mean Shaq + Kobe can outplay Duncan + Antonio Daniels? What a surprise!
You're lying about who the best player in those series were though. In 1999, 2002, and 2003, Duncan was clearly the best player in the series. In 2004 it was basically a wash between Duncan, Shaq, and Kobe, Kobe just took more shots (against single coverage) while Shaq and Duncan were both more efficient against tighter defense and came up bigger on the defensive end as well. The only series where Kobe was clearly the best player was 2001, and that was when he was going single coverage against shytty-ass Antonio Daniels all game while the entire Lakers defense was focused on Duncan since there were zero other threats.
I consider Shaq and Duncan to be at the same level all-time, and they peaked at the same time. So Duncan vs. Shaq was going to be close to a wash and victory would depend on the supporting casts. Shaq's #2 was Kobe and he often had a better cast #3-#7 as well, so the fact that the Spurs still won two titles in that period is wild.
Pop's strategy was to focus the Spurs' defense on stopping Shaq with both Robinson and Duncan zeroed in on him, then leave Kobe on an island against single coverage and hope Kobe shot them out of games. That's why Kobe took outrageous FGA for a player with a dominant scorer like Shaq on his team. Kobe took:
27 shots/game in 2003 (Shaq just 17)
22 shots/game in 2004 (Shaq just 14)
24 shots/game in 2002 (Shaq just 19)
26 shots/game in 2001 (Shaq just 21)
Even in 1999 when Kobe was just 20, he took 19 shots/game while Shaq took just 17. Those are WILD shooting volume #'s and in every case Kobe was putting up more shots against the Spurs than he did the rest of the postseason. But it wasn't efficient - Kobe's TS% was well under 50% every year except 2001, which was what Pop was hoping for and the only way the Spurs could win.
1999: Duncan puts up 29-11-3 and 2 blocks a game on 51% shooting against the Lakers, was clearly the best player. Spurs sweep.
2002: Duncan puts up 29-17-5 and 3 blocks a game on 43% shooting against the Lakers, was clearly the best player. Lakers win in 6 cause Duncan's #2 was a rookie TP with 13ppg on 41% shooting and no one else was in double figures.
2003: Duncan puts up 28-12-5 and 1 block/game on 53% shooting against the Lakers, was clearly the best player. Spurs win in 6.
You want to claim that Kobe was "clearly the best player" in ANY of those series, especially considering Duncan was the focus of the Lakers' defense in every game but Shaq was the focus of the Spurs' defense in every game?