From my understanding the key reason for video production using T-Stops is visual consistency, and the demands simply aren't nearly as tight in photography as videography due to how they're viewed and produced.
The human eye is very good at detecting changes in light. Not great at precisely measuring the change, but it becomes very obvious when there is a change. This is a problem if you're trying to make a movie because you will often not only cut between different camera angles in a scene, but also different takes. Combine different takes with reshoots, and imprecise f/stops become an editing headache.
If you go out to shoot a scene and are shooting at f/8 one day, then you want all the lighting to line up perfectly between your wide angle, your normal, and your telephoto lens shots. You don't want one to be a bit darker and one a bit lighter, as it will be harder to correct in post, and be more difficult to polish off in final editing.
Now to make things even more interesting - You come back to the same location to do reshoots two weeks later, and your camera crew arrives with the lenses handed to them that morning by the rental house... Your video post production team is not going to be happy with the results if the camera crew slapped on a different copy of the same model of lens, and 'surprise!' f/8 on this one isn't really completely the same as f/8 on the previous lens.
A small shift in depth of field? Well, that can be lived with. You're probably not going to notice too much from scene to scene/take to take if there is much motion involved. The human eye just can't notice it as easily. But it will notice if the light level keeps randomly shifting a bit between cuts.