The point of shadowing is to get an idea of what the work day is like so one can make at least a somewhat informed decision before making a commitment. Unfortunately, we've turned it into a process where it's done to fulfill requirements, check boxes and pad applications. I believe the idea that shadowing a non-MD/DO shows lack of commitment to being a physician is awful silly, but certainly may be present among some people. The bottom line is that there's no universal answer on this because ADCOMs are composed of individual people who have vastly different opinions.
If it were me, I'd put it on the application and be ready to talk about having opportunities to see the broad range of healthcare practice and how it fits together. I'd hesitate wanting to indulge in feeling like I had to hide this (podiatry) from a jealous girlfriend (medicine). If some individual or program was offended or displeased by my exploring options, then that's the type of culture I'd wish to avoid because there's more coming. And believe me, it's coming.