Will someone sit and look through my photos for fun?
The honest answer is that a person does look at them, and it would be a lie to say otherwise. Preparing a dataset is manual work: frames get cropped, tagged, and thrown out for being blurry or duplicated. Software cannot judge which shot of you is usable. Somebody sees every picture you send.
What that person is not doing is browsing. Access is scoped to preparing your dataset and training your model, it is limited to the smallest number of people who can do that work, and it is meant to be logged — so the question stops being "do you trust the person" and becomes "is there a record of who opened what".
There is no gallery view, no shared drive, and no public link. Your files are not a browsable library anyone can wander into, and once your dataset is prepared there is no ongoing reason for anyone to open the originals again.
