The FO in this case is 24 years old. It's unlikely she has very much flight time in jets.
A FO at a US major probably has at least 5000 hours, jet experience and most likely has some turbine PIC time too. I would expect that they'd catch on quickly
A low time and and little experienced pilot with excellent skills could outdo your hypothetical 5,000 hr turbine pic pilot with average or less skills in a crosswind. Your point is valid, but it also assumes the same basic skill level applies to all, which isn't always the case.