It would've been bad for lebron because the lakers would've thrashed those cavs teams
Cavs matched up a lot better against the Lakers than they did against the Magic/Celtics. The Lakers didn't have an offensively-minded 5, a stretch 4, or an elite PG to exploit the Cavs defensive weaknesses, and Lebron outplayed Kobe 80% of the times they met. That's why Lebron won the vast majority of his Kobe matchups.