I'd encourage actually visiting/posting on the podiatry forums before making assumptions. One of the posters in here is also a known podiatry forum troll (you can probably guess which one), so I'd take everything he says with a grain of salt, if even that.
To answer OP's question: You're basically asking if you want to be a generalist (assuming you don't go through a fellowship after your IM residency) or a specialist. Podiatry is very similar to dentistry in that you go through podiatry school specializing in that field from day one, whereas this obviously isn't the case with IM. Do you have a desire to become a cardiologist, pulmonologist, rheumatologist, etc.? Do you not have fellowship desires and just want to be a generalist? Don't have a clear idea where you see yourself in terms of specialty? In any of those cases, go IM.
You reap what you sow. Most people who don't match were people who couldn't handle being in medicine period and never put in the work to secure any type of residency position.