Not the OP, but the theory I've seen with those terms posits that the increased upward marketplace pressure toward tech jobs and office work have drastically in

Not the OP, but the theory I've seen with those terms posits that the increased upward marketplace pressure toward tech jobs and office work have drastically increased competition for the same jobs which were typically "feminine" roles, or at least "woman-friendly" roles. Meanwhile the masculine role-workers like coal miners are being pushed out due to environmental regulation and manufacturing is currently largely automated - and as the manufacturing becomes more and more automated, the upward pressure on tech increases because we don't need factory workers, we need robotics specialists and skilled machine operators.