You can't just call 'Flaps 3' as you may be landing in Flaps 3, or you may commence the go around from Flap 2. It is hardly rocket science to just move the flap lever up one stage. Mistakes do happen though, an ANY pilot is capable of making such a mis-selection.
One of my 'mates' was involved in a situation departing a major airport (UK) where he asked for 'gear-up' and the very experienced First Officer promptly retracted the flap to Flap 1. It was a co*kup but didn't result in either crew being stood down, it simply resulted in a notice to all aircrew reminding them to think about what they are moving before they move it.
This seems to me to be a bit of an over-reaction....... again.