I see where you are coming from with the irony. There is a lot of issues and opinions with aperture. Your views are correct. This is how i see it and my experience of togging....generally the sweet-spot area for most lens are when they are stopped down a couple or three stops. Please note my comments are general and this will depend on all sorts of variables, light, composition, distance etc etc. If you have a lens that has variable f say 4.5-6.3 then you will be stopping it down to say f8-f11. Ok alls well and good in good light or stability like on a bean bag or tripod. Obviously stopped down to f16 etc for landscape and on a tripod. However when shooting on the move or moving subjects then f2.8 or less is a must. I use a 70-200II IS F2.8 and from a fast moving vehicle for stills or video are perfect. I could go on but will not become too boring. Hope this helps.