Changing an image timestamp -- as in, exif metadata -- is trivially easy for anyone with a computer or phone, a quick search will tell you how to do it on any device with no skill involved. There's a difference between "easy for a small percentage of people" (modify the content of a photo in an undetectable way, find a software vulnerability, etc.) and "only a small percentage know how to do it" (modify exif values, do a simple magic trick, etc.). Just because someone doesn't know anyone can do it if they tried doesn't mean it's not trivial and pervasive.

The problem that to make a right query, one has to know at least part of the answer. To search for exif modification tool, it's essential to understand: - what is image file, and how information stored in it. - the concept of `metadata`, and exif in particular. - the concept that any file can be modified in place, or when you make a copy. - know what where's ecosystem of open/free/custom tools that can do an unusual tasks. The small percentage has all that knowledge at the hand to even get an idea of possibility to modify image timestamp

This.

I'm currently the originator and lead on a project that will have huge impact on our bottom line. The team is mostly junior people, so when I presented the plan the response I got wasn't "I didn't think we could do that", it was "I didn't even know that that is a thing".

There used to be a joke about Rumsfeld's "known unknowns" vs. "unknown unknowns", but it's so true. And to the vast majority of people in the world the question isn't "how" to change a timestamp, it's understanding that a timestamp can even be changed.