A Captain should have the right to a fully trained competent First Officer who is more thn capable of taking over the aircraft should he be required to.
All the captains I fly with have the added benefit of flying with a First Officer who in many cases is far more experienced than them and can point them in the right direction when required.
This stems from my Military training and extensive Military experience. The problem we have nowdays is that we have people occupying the LHS of large passenger jets who have nothing but a sketchy self improver background or worse are ex cadets.
Thankfully my ex RAF collegues and myself are around to address the balance and provide the expertise should it be lacking in the LHS.
LF