Many have gone from the left seat of a turbo prop to the left seat of a jet when the airlines they worked for at the time operated both types.
Some airlines put 200hr cadets in the right seat of a jet and yet others refuse to accept turbo prop time.
If you can fly a turbo prop, BJ or RJ well, you can fly any type. It all gets revealed or unraveled very quickly in the sim assessment.
In Etihad’s case it is cost control more than anything. They insist on recruiting type rated and current pilots only.
Emirates on the other hand are only limiting their options with stupid time and weight restrictions like those.
1500hrs, ICAO ATPL, is all they need. Most are looking at a good 5 years in the right seat now anyway.