My advice is to stick with human medicine unless you really, really, really cannot imagine not being a vet. Speaking as the daughter of a well-known and well-respected vet who has been in practice for 40+ years, the career just seems to have far more problems than human medicine in general.
School tuition/debt is roughly the same (maybe
slightly less), but there are far fewer vet schools than med schools (28 in the US),
you make far less money once you're out, you have far more competition for training spots, and job security is far less certain. Plus, you have to remember that even though you are helping animals as a vet, you end up spending most of your time around very sick animals, many of which will likely die. This can be pretty depressing if you're like me and thought that the saddest scene of I Am Legend was when the dog dies. Animals can't express what is bothering them so it can be incredibly challenging to figure out what is wrong and how to help.
Additionally, based off of what my mom has told me, the financial side of medicine is far more present in veterinary medicine than it is in human medicine. Most people don't have insurance on their pets, or if they do it is not for that much and is not as highly regulated as human medical insurance. This means that you will often have to pose the question to your clients, "
How much money is your pet's life and/or comfort worth to you?" Oftentimes, people cannot afford to drop 10k to save the life of their pet. This means that you will have to put the animal down because its owner could not afford to save it. It also means that when new and exciting technology and/or treatment gets developed, you still may not be able to use it because of the cost to the owner. Depressing, man. This situation simply does not exist for human medicine in the United States, where "how much" is rarely a factor in saving a person's life.
Finally, pet owners can be crazy. There is something about pet owners that in my opinion makes them far worse to deal with than it would be to deal with the family of an ill person, or even the ill person his or herself. I can't tell you the number of times my mom's clients have been complete ***holes to her, usually in situations where my mom could not do anything to save the animal and in turn she was blamed. And oh yeah, the legal liability issues are just as big if not bigger than they are in human medicine.
Tl;dr: Veterinary medicine and human medicine both have their fair share of 'problems.' But in my opinion, unless you literally cannot imagine a life as anything other than a vet, go for human medicine, adopt lots of pets, and buy them health insurance.