It’s like saying “Your Tinder profile will NOT contain any data/details about you or your dating search that will undermine you in your current relationship.”
Time frame is also very important. Example, a user has been with the company for over a decade, but the product has only been around for a few years. Or if one of the "achievements" was a test that was added recently.
But what if you didn't have one yesterday, but you do have one today? What if you have only worked for one employer since TripleByte was founded (2015)? What if the only place you've worked is a startup of which you're a cofounder?
If you can't think of a way in which a privacy leak can have consequences, that doesn't mean there aren't any.
In the sense of a likely reason for someone to draw an inference: Most people do not specifically seek out excuses to take tests, and do so only because they want something that the test provides them with, such as access to a job-hunting platform. Most people who want access to a job-hunting platform want it because they are job-hunting or plan to be soon.