It’s called playing the odds. When a player is injured for a pretty significant period time in 90% of his pro seasons you probably shouldn’t be counting on that guy to play 80+ games a year.
Klefbom played 82 games in 16-17, could have played 80 in 17-18 and lost 20 games to an errant stick breaking his hand in 18-19: something that has absolutely nothing to do with being "injury prone" on any level.
He has suffered three major time losses in his career. Two before he ever came to NA like 7 years ago, the other was a freak infection. There is no credibility behind this myth at all.