if you are not willing to sit in the RHS of a new type, why would they want to hire you?
Because in the real world (ie outside Oz/NZ), you get hired in the rank that you hold, unless moving to a much larger type, or unless you are an inexperienced captain.
So, for example, when I did my Easyjet sim check and interview, I was offered a direct entry command on the 737, and I had the same offer from Ryanair. That was at a time when I only had about 1000 jet command hours.
The same holds true in the contract world. Even some larger airlines, such as Emirates, hire captains for captains slots.
It is mostly in the South Pacific that you get this "must join at the bottom" bull. It is a rite of passage in OZ/NZ aviation, with no logical basis.
More to the point, if there was really a shortage, there would be no requirement to put highly experienced commanders in the RHS.