A few things...
*The Raptors and Celts combined for 114 wins during the regular season. While true neither club is operating at an all-time high you could re-write a lot of NBA history by dismissing teams who won that many games.
*The Cavs are a really poor team in the big picture of NBA history. They weren't favored in plenty of games in these playoffs and tons of people didn't think they'd get back to the Finals. Eight straight Finals, 6 straight game 7 wins, Love missing most of the last 2 games against the Celts, first team to beat the Celts after trailing 2-0, the amount of minutes and effort, plus the sheer quantity of highlight plays--it's been an absurd playoffs for LeBron.
*What LeBron is doing at his age during these playoffs is shocking. At this age MJ was haggard and scored 45 points on 35 shots with 1 assist and 1 rebound in a signature game 6 clincher against the Jazz. That's an iconic moment for MJ and he hung it up. LeBron finishes game 7 with Jeff Green as his best contributor while throwing up 35-15-9 and people are like, "Yeah not really a great game from LeBron." He's been so good that too many are getting numb to sensational games.
https://www.basketball-reference.com/play-index/tiny.fcgi?id=D3VfC
He's averaging 34.0 points, 9.2 rebounds, and 8.8 assists. Unless he takes a big step back in the Finals this will be another all-time playoff run. Even if they lose, his 2015, 2017, and 2018 runs are all-time Top 5 playoff efforts without a championship. Some only want to talk rings, and that's fine, but LeBron is still adding to a considerable legacy at this age and it's amazing.