LOL so true. But those extra items will take up less room and weight than extra clothes.
Not to be smug, but you will note that often those people "can just throw a few things in their suitcase and be done packing" often ask people like us "Hey you don't happen to a ___insert need here___" or "Crap, I guesse I should have brought *item X*, we need to stop at the store before we can do the things today".
Everyone has their own style of travel (and packing) that works for them. I personally enjoy trip planning and coming up with ways (hacks) to make my trip better/easier/more comfortable for me.