I'm flying 20-series Lears RIGHT NOW, with pilots who have no previous jet time and some who haven't flown ANYTHING in 3-5 years or more (on un-requested leave from a Major).
Sure, you let the F/O's fly and learn as they get progressively more experience. Sometimes you don't and you let them learn by watching you do it the correct way.
You have to judge where your first officer is in terms of overall experience and take the appropriate course of action to ensure a safe flight. Sometimes you let them fly the challenging leg; sometimes you don't. Depends on the person you're flying with.
In this scenario (at 24 she can't have had much experience), with winds gusting up to 59 kts around the time of the accident, I'm pretty certain I'd have elected to do the approach. Then again, we're all MMQB'ing here.
This accident, Germany.
PCL 3701, F/O was flying (the only one that Guppy Puppy got right) when the engines flamed out, although it was the CA who was stupid enough to let them get into that situation and watched the whole thing develop without taking any action to stop it.
I'd simply like to know the source where you can put a blanket statement to say that "any" accident where crew error was the primary cause "always" had the CA as the PF.