The Cleveland Cavaliers got the #1 pick 3 times in 4 years *after* also getting the #1 pick to draft Lebron James. To say they don't have Lottery Luck is beyond disingenuous. What has happened since is just the odds evening out.
Yes, I want a top pick every year, too (this year more than most) but its not likely to happen; regardless of the final record. Vegas always wins. We ain't Vegas.
1. The lottery ping-pong balls don't have a memory.
2. While I don't have the time now for a deep dive into the probabilities, I'm not convinced that the Cavs' results have been as skewed as you think.
They have had eight lottery picks since 2011. Six have been their own (2011, 2012, 2013, 2014, 2019, and 2020), then they traded for two others (LAC in 2011 and BKN in 2018). Three of those picks improved their position as a result of the lottery (the three #1s); the other five did not. Specifically:
2011: 2nd worst record; pick was 4th
2011: (from LAC) 8th worst record; pick was 1st
2012: tied for 2nd worst record; pick was 4th
2013: 3rd worst record; pick was 1st
2014: 9th worst record; pick was 1st
2018: (from BKN) 8th worst record; pick was 8th
2019: tied for 2nd worst record; pick was 5th
2020: 2nd worst record; pick was 5th
Compare that record to, say, the Sixers:
2010: 6th worst record; pick was 2nd
2011: (not in lottery)
2012: (not in lottery)
2013: tied for 11th-worst record; pick was 11th
2014: 2nd worst record; pick was 3rd
2015: 3rd worst record; pick was 3rd
2016: Worst record; pick was 1st
2017: 4th worst record; pick was 3rd (traded to BOS for #1 pick)
That's six lottery picks and five times that their ping-pong balls were picked; the one time they didn't get picked was when they had the 11th-worst record in 2013.
Again, I don't have time right now to dig any deeper, and I know this analysis has flaws (like lumping all times getting picked together, whether they got the 1st overall pick or the 4th). I'm just not willing to bobblehead and agree that "oh, the Cavs have had amazing lottery luck!"