Your overall point is correct but you're swinging the pendulum too far in the other direction. Pippen was never thought of as the second best player alive in real time. At his peak he was maybe a Top 5 guy. Maybe at the very crescent of his abilities...
But he was absolutely viewed as a Top 10 player thru his prime. He deserves his respect for that and if he was a Top 10 player playing next to Mike, it isn't at all a stretch to believe he could've been a more evolved, more dynamic player if he had a longer rope.
As it is Kawhi is the better player because we saw what a modern version of Pippen looked like when he got to become a #1. But we're talking about Kawhi, a guy who never truly dominated the sport himself, he has one title as a #1, he didn't have some extended decade-long run of dominance (he barely had a 5-year run); there's a bit of revisionism and exaggeration that goes on with Kawhi, too.
The years he finished highest in MVP (2nd in '16, 3rd in '17), think about those years. 2016 and 2017. Nobody in real time thought Kawhi was better than Durant, LeBron, or Curry. He was the new hotness and we watched him evolve from a historically great defensive player to "the best two way player", but like Pippen, he was never the second best player alive.
The year he won his title in Toronto, he had the benefit of a load-managed 60 games on a team that was elite before he got there (who just needed a closer); in a season that lost LeBron to injury, lost Durant to injury and he got to play that Finals vs a team down two of its three best players.
He was breaking down by the end of that series himself, in a loaded managed season. The revisionist exaggeration pieces went nuts after the W but we knew he wasnt better than the three guys we all knew were better players.
So like Pippen there's a similar archetype, albeit with a higher peak---because at peak Kawhi WAS a Top 5 player no doubt---but the gap between the two isnt so insane that you can't make this comparison.