@jpkmensah Same reasons there aren't more female bricklayers.

Emerging technologies reduce the burden of physical labor and costs can be cut by hiring women and children cheaper.

Once there is a demand for increased productivity then the low effort opportunities are found elsewhere.

Investors and child labor move onto the next big thing but only after some really hungry people built the framework.

Men get stuck doing inhuman labor faster for fear that regulators will shut them down.