Well, no, but at this point we get into what brand of shenanigans is taking place, which can probably parsed in r/timetravel. As far as r/GetMotivated is concerned, I think, the point is that if worrying is the only thing preventing a person from going back to change the future based on “what if I change too much,” that logic should be applied to the present for the sake of driving that same change intentionally, with a solid idea of a goal instead of a mystery box. . . . . .

Buuut if we want to get into the weeds immediately, I’ll comply; I don’t personally know of any proposed theories on time travel that would allow what you say wouldn’t happen, but it’s probably worth needling at. What I was meaning is that the ‘you’ that went back (u1) would either cease being (with the ‘you’ you convinced to do the hard work, u2, provided a solid impression someone else convinced them to do med school, and following through to the best of your ability) or nothing would change for u1, as what you’ve done is initiate a ‘potential’ future that u2 is now the driver for instead of fully retconning what you yourself did. Or your consciousness blends into a present version of u2, with no impression of what you went through as u1 to drive you to time travel (and so, no reason to need to do it, which doesn’t actually necessarily do a paradox).

Of course, u1 could also do things the long way and manually study for however long you feel appropriate to soak in the knowledge you seek, though at that point you’re less time traveling and more fully time displaced. But, again, something more appropriate for r/timetravel I imagine.