Pitch does control speed.
Power does control rate of climb or descent.
So gliders cant fly?
So when you flare with the throttle closed you cannot control ROD by pitch?
So in a low level go around just above the runway after a large bounce you will pitch down to increase the speed?
So if the engine stops you cannot control ROD at all?
Thats the problem with making unqualified statements!
You need to understand what the PRIMARY method of controlling ROD/height and airspeed on finals is but also understand that a combination may need to be used, such as in the Go Around. You also need to understand that both can be used the other way round as a secondary method of controlling height and speed!
.