Flying a widebody jet where you are above the weather for the majority of the flight and to an ILS or RNAV approach is easy in comparison. If a cadet pilot can fly a 320 or turboprop Europe then they can manage just fine with a highly automated 777/A350/747. Anyone that tells you otherwise has an over inflated ego.
That's if you assume everything goes absolutely fine from start to finish, which Yes, it sometimes does. Often however there are issues, it gets trickier, but that is still not we are really paid for, and not where the lack of experience bites. Howzabout the occasional trip requiring some prompt, possibly ballsy, outside the box decision making, possibly about something never experienced, never taught in the Vol8, or a genuine Tech Emergency with handling limits outside the crosswind or Dest and Alt below limits, or a Medical drama overhead Lakselv Or........
Those are the days we are paid for IMO, and absolutely have to rise to the challenge to get through, not look like a Deer in the headlights, an all too common expression these days. (Now where's my foot pump)