I look at it this way, If I've asked someone to get up at 0430 in the morning and then drive an hour to meet up with me and then walk another 30 minutes to get the actual shooting spot. I can certainly take a minute to take a few meter readings before we start shooting, as well when the light appears to be changing.
I agree.
As I have said before, in this thread and elsewhere, metering is one of the tools of photography. It behooves us to use those tools and use them properly if we care about the results we're creating.
I do not think any of us would advocate not composing a scene, but just randomly waving their camera about and pressing the shutter. None of us would focus by turning the focus ring randomly and guessing at what might be right without actually confirming through the viewfinder. None of us would pick a shutter speed or aperture at random, without caring what the result would be. These are all tools which allow us to creatively control our photographs, and we recognize them and use them.
Exposure is no different. Yes, a person can use general precepts to obtain an acceptable exposure in some circumstances - but why? Meters are built into cameras now, and external meters are cheap and accurate for use with cameras which do not have internal meters. And when the general precept fails, such as when "Sunny 16" turns out not to be your friend, you do not obtain the shot you hoped for. That some can claim this is OK because it does not negatively impact the 'purity' of their experience is beyond my ken. I can only conclude such people are truly idiots. If your goal is to take a photograph, and your photograph is ruined because you refused to meter, then I do not see the redemptive purity of the experience. One might as well randomly not load film into one's camera, for the purity of it all.
The human eye does not measure light. It interprets light, and it does it very well. By adjusting the iris and the sensitivity of the eye's "ISO," the eye presents us with usable images in all sorts of lighting situations. Ideal for vision - not ideal for objective measurements.
And still, after all this nonsense, I cannot grasp the concept of why anyone would intentionally want to refuse to meter, when it takes a second, increases creative control, and can result in a photograph saved from clueless guessing.
It's like insisting on wearing a blindfold whilst hamming nails in a plank. One might actually hammer in a few nails - one might also break one's fingers holding the nail - but oh well, it's the purity of the experience that matters, not actually hamming in the nail. Right? Why not take the blindfold off? Oh no, mustn't do that, much better to guess where the nail might be - experience will be our guide. If we miss and mash our hands, even better.