If only it was that quick.

I’d I die if I had the yearly totals of these pilots.

If you are leaving school you might be lucky to retire on a widebody let alone know what fleets will even exist in 40 years.
10 Years in GA/Regional
5 Years Regional Command
10 Years Narrow FO
10 Years Narrow Command
Then Widebody Command
Age- Prob 55-60.

On the Health front, I couldn’t imagine slogging out 30 years on the current EBA.

More relevant than health will be the fact that widebodies won’t exist in Jetstar in the near future, we will all be flying A321 XLR’s on 8 hour sectors........ return probably :-(

This craving for a Wide-Body Command is a classic case of 'grass is greener syndrome' and intrigues me no end. I guess the pay is a factor but some 747 Freighter operators in Asia pay no more than is on offer on some narrow-body contracts.
After retiring as a Long-Haul WB Captain I came back to the domestic narrow body world. I have to say I much prefer the short-haul flying. There is nothing glamourous about managing a flight for 14 hours and living in Hotels fatigued out of your brain. If I could live my career again I would stay a domestic pilot. Horses for courses I suppose but be careful what you wish for.