You want the last 30 years? Since Jordan won his last NBA title in 1998, four players... Kobe Bryant, Tim Duncan, LeBron James and Stephen Curry... have combined to win 18 of the next 25 titles, which is 72%. That 45% is skewed? Not by much. Since 2000 Boston or LA has won it 30% of the time. La, Gs, Sa have 14 since 2000. That's 61%
Has the last five years been good on the team parity front? Yes I suppose but one of those teams is LA and Golden State is in there too. The parity is an issue because the NBA is super star driven, super stars want to be in big markets.
FA hasn't been kind to small market teams historically. Even golden states run was mostly drafted players with KD sandwiched in the middle because he wanted to join the prior winning team. Props to their front office. When we discuss the Orlando magic, one of their main issues is FA due to small market.
Your toast is burnt. Chief