Time. Men have given up autonomy over their time and children's time has been commercialized. Men are either holding their wife's purse at the mall or working to pay for the kid's sports camps or driving the kids to sports..
When sailplane racing was popular if dad was a sailplane pilot you grew up at the airport, if dad was a sailor you grew on the water, if dad liked model trains you grew up at train shows. Now kids grow up doing activities which suck money and time from the parents.
Until men reclaim control over their time many once robust activities will struggle.