They usually don't look at the important things (most of which is never recorded in EXIF), like where the light is coming from, whether or not reflectors or ext

They usually don't look at the important things (most of which is never recorded in EXIF), like where the light is coming from, whether or not reflectors or external (usually non-TTL) flash were used, and so forth. Beyond "wide" or "narrow" (for the sensor format and focal length), the aperture is rarely critical; the same applies to "slow" and "fast" shutter speeds. Both of those can be derived by eye, and if they add up to "not enough light", then there must have been a higher ISO in use. And I'm rather hoping that some day people will figure out that distance controls perspective and focal length merely changes the framing. (Fisheyes being an exception here, but they're sort of easy to spot. And Scheimpflug corrections are not EXIF-compatible.) The actual numbers don't particularly matter, and are highly situational.