Lakers and Celtics should not be discussed in this Matters tough.
One thing is Beating the Odds for a Pick and then winning a Couple Ships, like Spurs ( curious no one has mentioned it, Spurs getting #1 in the only year they had a bad season in a whole decade...)
You can call luck too when the guy before you in the draft makes a horrible Decision and that gives you the player that leads you to multiple Championships.
But Lakers or Celtics? No man, that is called GOOD MANAGEMENT.
Its more than Probable that Jerry West and Specially Red Auerbach are the Wisest Gms ever in the league, luck does not have to do anything with that.
Luck does not bring you rings in every decade but 90s (Celtics) or in every Decade but 60s (Lakers).