Correct. I've played a fair amount on the computer with a keyboard and mouse and hours can easily pass by.
I found the controller very difficult when I tried it, and I'm one that generally opts for a console with nearly every other game.
Dunno, once muscle memory kicks in, sorting the inventory, selecting recipes etc. all happens seamlessly without much though for me and my 6yo kid. I prefer playing on pc because of performance and visuals, but since most of minecraft gaming is done on the tv on a console, I'd say that after some playing one can become 90% as efficient as on pc (subjective ofc). Building blocks with mouse is more precise of course with a mouse nevertheless.