What I am saying is it depends on the plane, 2 crew in a plane built for single pilot isn't really a saftey increase, 1 person in a multi crew plane is also a bad idea, just depends on the plane.
Pilot, FO and flight engineer in a 172 is stupid
Single pilot in a 747 is stupid.
Yes it is a safety increase. It's not about the number of switches one pilot can push, it's about redundancy.... Verifying altitudes and double checking everything. I would not expect you to understand all of that if you were never trained in crew CRM.
Never trained for dual crew, that was what I was saying, lots of single pilot training and rides, and what I said about the engineer was along with what I said above, it's not ALWAYS better, it's airframe specific, just like a kitchen, sometimes too many cooks spoil the stew, sometimes it's needed.