That reminds me to strip that MF lens, I dropped it and one of my elements broke loose 🙁 Clean-room I can borrow, anyone?!
my subjects often move unpredictably
True, and a fair point indeed to be fair to you.
Regarding hifi stuff, no, IMO, it's not. And image can be made or broken by its sharpness/fuzzyness, so it's not quite the same as directional cables 🙂 If you pay enough attention to hiss in a musical recording it can spoil the music, if you rely on sharpness to contrast against softness in an image to help make the image, you'll notice a soft lens. It's fairly easy to lock out at f9 and get a nice evenly focused image, its not so easy to get a crystal-sharp closeup with a nice fuzzy rear when you're hobbled by a poor lens. In the same way it's easy to generate a fairly universal poppy chart topper to a format, but it's fairly hard to generate an iconic song that lasts generations and it takes attention to detail.
'sup to you anyway, I'm a bit of a pixel peeper, I look for every imperfection in everything and bin 80% of my images.