Comparing Lebron playing the same good defensive team 3 or 6 times in a row is not the same as Lebron playing a random 3-6 teams in a row during the NBA season.
It's so easy to demonstrate Lebron checks out when games matter. Not sure why such a silly streak must be established. It's like when ESPN says "1st left handed player in 35 years to have X points, Y assists, Z rebounds while playing between 33 and 35 minutes"
But we aren't talking about a guy that averages 50FG% meeting a good defensive team and seeing his percentage dip to say, 40-45% for maybe two to three straight games. That's what is to be expected, right?
Lebron's shooting numbers drop by anywhere from 30-50%, in multiple series spanning three to four games. He's never established those kinds of streaks in the regular season (where I would argue it's more likely to happen due to schedule, fatigue, rustiness, injury, no-fucks-given, many more games played, what-not). It's baffling.