If all leagues were same size, say 12-team 3C/3LW/3RW leagues, I think they'd carry more interest.
It's a carry-over stat/column from fantasy football where most leagues have the same roster allocation and are often the same size (10 or 12-team leagues).
I check it occasionally in fantasy football, but can't say I ever use it for fantasy hockey.
Mind you, I consider myself an "expert" in fantasy hockey and simply a "stat-cruncher" in fantasy football.