The problem with that idea is that there is no evidence that we are seeing more family dynasties.
IMO simply looking at the number of sibling pairs in the NHL is strong anecdotal evidence.
A decade ago when the Benns arrived, they made 15 brother combinations playing in the NHL simultaneously. That accounted for 31 players, or
about 5% of the league who were brothers. This does not even touch dads, uncles, etc who were former players.
I mean... let's wrap our heads around that. It's an insane number. There's no way a merit-based competitive system would spit out that kind of result.
It's worth noting that this isn't solely a hockey issue.
- There are 9 pairs of brothers in the NBA, of whom nearly all are children of pro or high-end college players. That would represent about 3% of the NBA. Of course, basketball has a much more clear-cut genetic component than nearly any other sport with a clear ban on normally proportioned humans, so it's perhaps no surprise that we would see NBA-proportioned parents producing NBA-proportioned families.
- I can't find any real data on the NFL, but their website identifies what looks like about 10 pairs of brothers who were active players when the list was made a couple of years ago. That would represent about 1% of the NFL, assuming all of them were active simultaneously.
- Baseball, as usual has the most obsessively-tracked data available. It's hard to parse the data visually, but I think I count 10 pairs of brothers who made appearances in 2019, or about 2-3% of MLB. I think this is the most useful data point, not just because it's closely tracked but also because baseball is a relatively accessible, globalized sport with a low genetic and economic barrier for entry.
I would love to have these figures for top-level soccer globally, but that's so complicated I wouldn't know where to begin.
Anyway, putting this all together it certainly
appears that
professional advancement in elite hockey is about twice as likely to be based on purely family connections compared the other major sports. As a proxy for inefficiencies in the development pipeline, that speaks very clearly to the sport falling behind and possibly even moving in the wrong direction with regard to youth development.