This is the more appropriate thread for this discussion… am of the view that recruits with 3-4 years life experience since leaving studies who are seeking a career are better suited to CC roles than those wanting an extended gap-year adventure job.
The implications are higher cost, however as a significant element of the role is around inflight issue management, not just waiting-on, a seasoned head with more mature interpersonal skills is evidently better and would require less management.
In addition a higher calibre of recruit is more likely to effectively handle the foibles and idiosyncracies of F pax.
One also needs to factor-in the higher turnover rate of the gap-year crew and associated initial recruitment and its infrastructure, training, kitting-out costs etc to establish a comparative cost of employment. Maternity leave will be a moot point.