Your lecturing to me aside, I know what depression is. Take another example. If a woman is raped, and then goes thru depression, is her rape a "trigger" for hidden depressive feelings she always had or is it the cause of her depression? Take several seats. You just saying automatically that it isn't because he doesn't like med school is dismissive and wrong.
This exact advice of just pushing thru it can also result in the opposite effect of a dead student who pushed himself/herself to the limit. Right now he is just at 100 K debt. Not optimal but still manageable, but you think adding another 100 K more will fix things? Oh, and first year is hardly a breaking point. It's an ego and pride buster for sure when it comes to grades, but it is not even close to the type of resilience you'll need to have in third year.
Well that example is quite a severe trauma. The thing is, with that situation, given the right time and support, the raped person will not have to live in a chronic state of major depression. She will be depressed, b/c she has been traumatized and grossly violated, but as she goes through the stages of grieving and coping with the trauma, if she doesn't have 1st degree depression, she will not necessarily continue in a stage of chronic, first degree depression. The latter is something that is totally screwy in the brain. Yes you can do the whole chicken and egg thing; but I have seen this consistently. Those w/ first degree major depression could have everything going incredibly well in their lives--win the lottery, relationships are good, normal stress, and many great things going on, and still the struggle with the daily dread of walking through an endless, dark tunnel, while feeling like you are forced to wear an the lead overcoat of chronic, major depression, for which they must comply w/ medicine and treatment and push through, it indeed becomes a lot like DM or cardiac disease. It can be a very difficult thing to explain or understand, but the obvious factor is that something is screwy w/ neurotransmission. Sometimes it can be an endocrine issue, which when balanced out, takes care of things. Other times, it's even more complex. I mean look at bipolar disorders.
Again the OP should follow the good advice here and work on taking care of himself/herself and what the deal is w/ the depression. If it is circumstance related, it processing over time, it will abate. If after a year or more w/ it persisting, no matter what they do or their situation, Ey, it's a good idea to get down to the brain organics on this. Either way, it should help and not hurt to see a reputable professional. If you are too caught up in the disorder, you will not be able to see clear the forrest for the trees....so, first things first.