Earlier in his career, until around the time of his MVP win (before all the injuries), Durant was on course to break Kareems record one day. You could also argue that without all his injuries, he maybe would be an even better player today, would maybe averaging even more PPG now in his mid-30s than he already does.
Did the injuries of KD allow Lebron to be the all-time points leader for years to come?
No. LBJ came out of highschool at 18 that’s one year or 2000 points advantage while he plays till around 40. Their scoring ability is not that far apart on averages